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1918 United States House of Representatives elections

House elections for the 66th U.S. Congress

Field	Value
election_name	1918 United States House of Representatives elections
country	United States
flag_year	1912
type	legislative
ongoing	no
previous_election	1916 United States House of Representatives elections
previous_year	1916
next_election	1920 United States House of Representatives elections
next_year	1920
outgoing_members	65th United States Congress#House of Representatives_3
elected_members	66th United States Congress#House of Representatives_3
seats_for_election	All 435 seats in the United States House of Representatives
majority_seats	218
election_date	November 5, 1918
image_size	160x180px
party1	Republican Party (US)
image1	FrederickHGillett.jpg
leader1	Frederick Gillett
leader_since1	May 19, 1919
leaders_seat1
last_election1	216 seats
seats1	240
seat_change1	24
popular_vote1	6,661,655
percentage1	52.42%
swing1	4.07
party2	Democratic Party (US)
image2	CLARK, CHAMP LCCN2016856460 (cropped)(b).jpg
leader2	Champ Clark
leader_since2	March 4, 1909
leaders_seat2
last_election2	214 seats
seats2	192
seat_change2	22
popular_vote2	5,458,549
percentage2	42.95%
swing2	2.96
party4	Socialist Party of America
<!--small parties do not need to post leaders in Infoboxes-->	last_election4	1 seat
seats4	1
seat_change4
popular_vote4	406,852
percentage4	3.20%
swing4	0.43
party5	Prohibition Party
<!--small parties do not need to post leaders in Infoboxes-->	last_election5	1 seat
seats5	1
seat_change5
popular_vote5	120,789
percentage5	0.95%
swing5	0.55
party7	Independent
<!--small parties do not need to post leaders in Infoboxes-->	last_election7	0 seats
seats7	1
seat_change7	1
popular_vote7	60,646
percentage7	0.48%
swing7	0.08
title	Speaker
before_election	Champ Clark
before_party	Democratic Party (US)
after_election	Frederick Gillett
after_party	Republican Party (US)
map_size	320px
map_image	File:1918 United States House Map.png
map_caption	Results:

The 1918 United States House of Representatives elections were elections for the United States House of Representatives to elect members to serve in the 66th United States Congress. They were held for the most part on November 5, 1918, while Maine held theirs on September 9. They occurred in the middle of President Woodrow Wilson's second term.

With the country in World War I (contrary to previous promises by Wilson), and Wilson's personal popularity ebbing, the Republicans gained 25 seats and took over control of the House from Wilson's Democrats. Internal divide among Democratic leadership over aspects related to payment of the war also decreased the unity of the party, which had been the organization's strength during the decade. The Progressive Party also disappeared, with its former members generally becoming Democrats. Minnesota's Farmer–Labor Party, a descendant of populism, also gained its very first seat.

Frederick H. Gillett (R-Massachusetts) became Speaker, and previous speaker Champ Clark (D-Missouri) became Minority Leader.

Background

Woodrow Wilson was elected to the presidency in the 1912 presidential election and his victory in the 1916 election made him the first Democratic president to win reelection since Andrew Jackson had in the 1832 election.

Wilson's wheat policies aided in the Democratic defeat. The Food and Fuel Control Act allowed for the cost of wheat to be set at a price control limit of $2.20 per bushel while other products like cotton were not. Wilson later vetoed an attempt by the Republicans to increase the limit to $2.40 per bushel. Republicans were more likely to gain seats in areas with higher amounts of wheat acreage with the Republicans gaining twenty-two seats in the ten highest wheat producing states while the Democrats only gained two seats.

Wilson was also unable to aid the Democratic candidates before the election due to his preparations for involvement in the Paris Peace Conference.

Overall results

Party	Total
seats	Change	Seat
percentage	Republican Party	Democratic Party	Farmer–Labor Party	Prohibition Party	Totals	4351
240	25	55.2%
192	22	44.2%
1	1	0.2%
1		0.2%

1 One vacancy, Victor L. Berger, a member of the Socialist Party of America, whom the House refused to seat.

Election summaries

Democratic Party (US)}}; width:44.14%"	Democratic		Republican Party (US)}}; width:55.17%"	Republican

State	Type	Total
seats	Republican	Democratic	Progressive	Others		Seats		Change		Seats		Change		Seats		Change	Seats	Change	Alabama	Arizona	Arkansas	California	Colorado	Connecticut	Delaware	Florida	Georgia	Idaho	Illinois	Indiana	Iowa	Kansas	Kentucky	Louisiana	Maine	Maryland	Massachusetts	Michigan	Minnesota	Mississippi	Missouri	Montana	Nebraska	Nevada	New Hampshire	New Jersey	New Mexico	New York	North Carolina	North Dakota	Ohio	Oklahoma	Oregon	Pennsylvania	Rhode Island	South Carolina	South Dakota	Tennessee	Texas	Utah	Vermont	Virginia	Washington	West Virginia	Wisconsin	Wyoming	Total	435	239
54.9%		23		193
44.4%		21		0
0.0%		3	3
0.7%	1
Districts	10		0				10				0			0
At-large	1		0				1				0			0
Districts	7		0				7				0			0
Districts	11		6		1		4				0		1		1
Districts	4		3		2		1		2		0			0
Districts	5		4				1				0			0
At-large	1		1		1		0		1		0			0
Districts	4		0				4				0			0
Districts	12		0				12				0			0
District	2		2				0				0			0
District
+2 at-large	27		22		1		5		1		0			0
Districts	13		13		4		0		4		0			0
Districts	11		11				0				0			0
Districts	8		7		4		1		4		0			0
Districts	11		3		1		8		1		0			0
Districts	8		0				8		1		0		1	0
Districts	4		4				0				0			0
Districts	6		3		1		3		1		0			0
Districts	16		12				4				0			0
Districts	13		12				1				0			0
Districts	10		8		1		1				0				1		1
Districts	8		0				8				0			0
Districts	16		5		3		11		3		0			0
District	2		1				1				0			0
Districts	6		6		3		0		3		0			0
At-large	1		0		1		1		1		0			0
Districts	2		2				0				0			0
Districts	12		7		2		5		2		0			0
At-large	1		1		1		0		1		0			0
Districts	43		24		2		19		3		0			0	1
Districts	10		0				10				0			0
Districts	3		3				0				0			0
Districts	22		14		5		8		5		0			0
Districts	8		1		1		7		1		0			0
Districts	3		3				0				0			0
District
+4 at-large	36		30		1		6				0		1	0
Districts	3		3		1		0		1		0			0
Districts	7		0				7				0			0
Districts	3		2				1				0			0
Districts	10		2				8				0			0
District	18		0				18				0			0
Districts	2		0				2				0			0
Districts	2		2				0				0			0
Districts	10		1				9				0			0
Districts	5		5		1		0		1		0			0
District	6		5		1		1		1		0			0
Districts	11		10		1		0				0				1		1
At-large	1		1				0				0			0

House seats by party holding plurality in state

| [[File:66 us house changes.png|thumb|450px|

Net gain in party representation

Special elections

Sorted by election date, then by state/district.

District	Incumbent	This race	Member	First elected
John J. Fitzgerald		Democratic	1898	Incumbent resigned December 31, 1917.
Successor was elected March 5, 1918.
Democratic hold.	nowrap	{{Plainlist
Daniel J. Griffin		Democratic	1912	Incumbent resigned December 31, 1917, after being elected Sheriff of Kings County, New York.
Successor was elected March 5, 1918.
Democratic hold.	nowrap	{{Plainlist
George M. Hulbert		Democratic	1914	Incumbent resigned January 1, 1918, to become Commissioner of Docks and director of the Port of New York.
Successor was elected March 5, 1918.
Democratic hold.	nowrap	{{Plainlist
Henry Bruckner		Democratic	1912	Incumbent resigned December 31, 1917.
Successor was elected March 5, 1918.
Democratic hold.	nowrap	{{Plainlist
Charles Martin		Democratic	1916	Incumbent resigned October 28, 1917.
Successor was elected April 2, 1918.
Democratic hold.	nowrap	{{Plainlist
William A. Jones		Democratic	1890	Incumbent died April 17, 1918.
Successor was elected July 2, 1918.
Democratic hold.	nowrap	{{Plainlist
Fred Talbott		Democratic	1878
1884 (retired)
1892
1894 (lost)
1902		Incumbent died October 5, 1918.
Successor was elected November 5, 1918.
Democratic hold.	nowrap	{{Plainlist
Jacob E. Meeker		Republican	1914	Incumbent died October 16, 1918.
New member elected November 5, 1918.
Republican hold.
Winner was not elected to the next term; see below.
Republican hold.	nowrap	{{Plainlist
John H. Capstick		Republican	1914	Incumbent died March 17, 1918.
Successor was elected November 5, 1918.
Republican hold.	nowrap	{{Plainlist
Ellsworth Raymond Bathrick		Democratic	1916	Incumbent died December 23, 1917.
New member elected November 5, 1918.
Democratic hold.
Winner was elected to the next term; see below.
Democratic hold.	nowrap	{{Plainlist
James H. Davidson		Republican	1896
1912 (lost)
1916		Incumbent died August 6, 1918.
Successor was elected November 5, 1918.
Republican hold.	nowrap	{{Plainlist
Irvine Lenroot		Republican	1908	Incumbent resigned April 17, 1918, after being elected to the U.S. Senate.
Successor was elected November 5, 1918.
Republican hold.	nowrap	{{Plainlist

Alabama

|- ! | Oscar Lee Gray | | Democratic | 1914 | | Incumbent retired. Democratic hold. | nowrap | {{Plainlist|

John McDuffie (Democratic)
Unopposed

|- ! | S. Hubert Dent Jr. | | Democratic | 1908 | Incumbent re-elected. | nowrap | {{Plainlist|

S. Hubert Dent Jr. (Democratic)
Unopposed

|- ! | Henry B. Steagall | | Democratic | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Henry B. Steagall (Democratic)
Unopposed

|- ! | Fred L. Blackmon | | Democratic | 1910 | Incumbent re-elected. | nowrap | {{Plainlist|

Fred L. Blackmon (Democratic) 66.15%
J. A. Bingham (Republican) 33.85%

|- ! | J. Thomas Heflin | | Democratic | 1904 | Incumbent re-elected. | nowrap | {{Plainlist|

J. Thomas Heflin (Democratic)
Unopposed

|- ! | William B. Oliver | | Democratic | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

William B. Oliver (Democratic)
Unopposed

|- ! | John L. Burnett | | Democratic | 1898 | Incumbent re-elected. | nowrap | {{Plainlist|

John L. Burnett (Democratic) 56.23%
Oliver D. Street (Republican) 43.78%

|- ! | Edward B. Almon | | Democratic | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Edward B. Almon (Democratic)
Unopposed

|- ! | George Huddleston | | Democratic | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

George Huddleston (Democratic) 85.78%
Joseph O. Thompson (Republican) 14.22

|- ! | William B. Bankhead | | Democratic | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

William B. Bankhead (Democratic)
Unopposed

Arizona

Main article: 1918 United States House of Representatives election in Arizona

70–80%}}

|- ! | Carl Hayden | | Democratic | 1912 (new state) | Incumbent re-elected. | nowrap | {{Plainlist|

Carl Hayden (Democratic) 60.40%
Thomas Maddock (Republican) 37.90%
Peter T. Robertson (Socialist) 1.70%

Arkansas

|- ! | Thaddeus H. Caraway | | Democratic | 1912 | Incumbent re-elected. | nowrap | {{Plainlist|

Thaddeus H. Caraway (Democratic)
Unopposed

|- ! | William A. Oldfield | | Democratic | 1908 | Incumbent re-elected. | nowrap | {{Plainlist|

William A. Oldfield (Democratic)
Unopposed

|- ! | John N. Tillman | | Democratic | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

John N. Tillman (Democratic)
Unopposed

|- ! | Otis Wingo | | Democratic | 1912 | Incumbent re-elected. | nowrap | {{Plainlist|

Otis Wingo (Democratic)
Unopposed

|- ! | Henderson M. Jacoway | | Democratic | 1910 | Incumbent re-elected. | nowrap | {{Plainlist|

Henderson M. Jacoway (Democratic)
Unopposed

|- ! | Samuel M. Taylor | | Democratic | 1913 (special) | Incumbent re-elected. | nowrap | {{Plainlist|

Samuel M. Taylor (Democratic)
Unopposed

|- ! | William S. Goodwin | | Democratic | 1910 | Incumbent re-elected. | nowrap | {{Plainlist|

William S. Goodwin (Democratic)
Unopposed

California

Main article: 1918 United States House of Representatives elections in California

|- ! | Clarence F. Lea | | Democratic | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

Clarence F. Lea (Democratic)
Unopposed

|- ! | John E. Raker | | Democratic | 1910 | Incumbent re-elected. | nowrap | {{Plainlist|

John E. Raker (Democratic)
Unopposed

|- ! | Charles F. Curry | | Republican | 1912 | Incumbent re-elected. | nowrap | {{Plainlist|

Charles F. Curry (Republican) 91.6%
Allen K. Gifford (Socialist) 8.4%

|- ! | Julius Kahn | | Republican | 1898 | Incumbent re-elected. | nowrap | {{Plainlist|

Julius Kahn (Republican) 86.6%
William Short (Socialist) 13.4%

|- ! | John I. Nolan | | Republican | 1912 | Incumbent re-elected. | nowrap | {{Plainlist|

John I. Nolan (Republican) 87%
Thomas F. Feeley (Socialist) 13%

|- ! | John A. Elston | | Progressive | 1912 | | Incumbent re-elected as a Republican. Republican gain. | nowrap | {{Plainlist|

John A. Elston (Republican) 88.4%
Luella Twining (Socialist) 11.6%

|- ! | Denver S. Church | | Democratic | 1912 | | Incumbent retired. Republican gain. | nowrap | {{Plainlist|

Henry E. Barbour (Republican) 52.1%
Henry Hawson (Democratic) 47.9%

|- ! | Everis A. Hayes | | Republican | 1904 | | Incumbent lost re-election. Democratic gain. | nowrap | {{Plainlist|

Hugh S. Hersman (Democratic) 53%
Everis A. Hayes (Republican) 47%

|- ! | Charles H. Randall | | Prohibition | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Charles H. Randall (Prohibition) 53%
Montaville Flowers (Republican) 43.3%
Grace Silver Henry (Socialist) 3.7%

|- ! | Henry Z. Osborne | | Republican | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

Henry Z. Osborne (Republican) 88.2%
James H. Ryckman (Socialist) 11.8%

|- ! | William Kettner | | Democratic | 1912 | Incumbent re-elected. | nowrap | {{Plainlist|

William Kettner (Democratic) 72.2%
N. D. Hamilton (Prohibition) 27.8%

Colorado

|- ! | Benjamin C. Hilliard | | Democratic | 1914 | | Incumbent lost re-election as an Independent. Republican gain. | nowrap | {{Plainlist|

William N. Vaile (Republican) 54.2%
John L. Stack (Democratic) 31.9%
Benjamin C. Hilliard (Independent) 11.9%
Fred Underhill (Socialist) 2.0%

|- ! | Charles B. Timberlake | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Charles B. Timberlake (Republican) 61.5%
R. E. Jones (Democratic) 38.5%

|- ! | Edward Keating | | Democratic | 1912 | | Incumbent lost re-election. Republican gain. | nowrap | {{Plainlist|

Guy U. Hardy (Republican) 51.0%
Edward Keating (Democratic) 46.7%
Edith Halcomb (Socialist) 2.3%

|- ! | Edward T. Taylor | | Democratic | 1908 | Incumbent re-elected. | nowrap | {{Plainlist|

Edward T. Taylor (Democratic) 65.7%
Straud M. Logan (Republican) 34.3%

Connecticut

|- ! | Augustine Lonergan | | Democratic | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

Augustine Lonergan (Democratic) 53.45%
George A. Quigley (Republican) 42.59%
Henry Vanderburgh (Socialist) 2.59%}} | George H. Wilder (Prohibition) 0.93% | Patrick A. Murphy (Socialist Labor) 0.40% | Gaius W. McClunie (Citizens) 0.04%

|- ! | Richard P. Freeman | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Richard P. Freeman (Republican) 53.11%
Frank P. Fenton (Democratic) 44.01%}} | Charles F. Muller (Socialist) 1.72% | Arthur W. Chaffee (Prohibition) 0.74% | Albert H. Frink (Socialist Labor) 0.34% | Lester D. Schriver (National) 0.08%

|- ! | John Q. Tilson | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

John Q. Tilson (Republican) 50.51%
Arthur B. O'Keefe (Democratic) 45.61%
Walter E. Davis (Socialist) 2.92%}} | Herbert M. Hancock (Prohibition) 0.58% | John D. Carlson (Socialist Labor) 0.39%

|- ! | Schuyler Merritt | | Republican | 1917 (special) | Incumbent re-elected. | nowrap | {{Plainlist|

Schuyler Merritt (Republican) 53.56%
Charles J. Peck (Democratic) 43.36%
Frederick Cederholm (Socialist) 2.33%}} | Charles B. Aliyn (Prohibition) 0.38% | Carl A. Peterson (Socialist Labor) 0.32% | Phillip A. Desilets (National) 0.05%

|- ! | James P. Glynn | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

James P. Glynn (Republican) 50.11%
Edward L. Seery (Democratic) 47.07%
Charles T. Peach (Socialist) 2.28%
Eugene L. Richards (Prohibition) 0.53%

Delaware

|- ! | Albert F. Polk | | Democratic | 1916 | | Incumbent lost re-election. Republican gain. | nowrap | {{Plainlist|

Caleb R. Layton (Republican) 51.40%
Albert F. Polk (Democratic) 47.59%
William H. Crawford (Socialist) 1.02%

Florida

|- ! | Herbert J. Drane | | Democratic | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

Herbert J. Drane (Democratic)
Unopposed

|- ! | Frank Clark | | Democratic | 1904 | Incumbent re-elected. | nowrap | {{Plainlist|

Frank Clark (Democratic)
Unopposed

|- ! | Walter Kehoe | | Democratic | 1916 | | Incumbent lost renomination. Democratic hold. | nowrap | {{Plainlist|

John H. Smithwick (Democratic)
Unopposed

|- ! | William J. Sears | | Democratic | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

William J. Sears (Democratic)
Unopposed

Georgia

|- ! | James W. Overstreet | | Democratic | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

James W. Overstreet (Democratic)
Unopposed

|- ! | Frank Park | | Democratic | 1913 (special) | Incumbent re-elected. | nowrap | {{Plainlist|

Frank Park (Democratic)
Unopposed

|- ! | Charles R. Crisp | | Democratic | 1912 | Incumbent re-elected. | nowrap | {{Plainlist|

Charles R. Crisp (Democratic)
Unopposed

|- ! | William C. Wright | | Democratic | 1918 (special) | Incumbent re-elected. | nowrap | {{Plainlist|

William C. Wright (Democratic)
Unopposed

|- ! | William S. Howard | | Democratic | 1910 | | Incumbent retired to run for U.S. Senator. Democratic hold. | nowrap | {{Plainlist|

William D. Upshaw (Democratic)
Unopposed

|- ! | James W. Wise | | Democratic | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

James W. Wise (Democratic)
Unopposed

|- ! | Gordon Lee | | Democratic | 1904 | Incumbent re-elected. | nowrap | {{Plainlist|

Gordon Lee (Democratic) 82.5%
T. R. Glenn (Republican) 17.5%

|- ! | Charles H. Brand | | Democratic | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

Charles H. Brand (Democratic)
Unopposed

|- ! | Thomas M. Bell | | Democratic | 1904 | Incumbent re-elected. | nowrap | {{Plainlist|

Thomas M. Bell (Democratic) 81.5%
John M. Johnson (Republican) 18.5%

|- ! | Carl Vinson | | Democratic | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Carl Vinson (Democratic)
Unopposed

|- ! | John R. Walker | | Democratic | 1912 | | Incumbent lost renomination. Democratic hold. | nowrap | {{Plainlist|

William C. Lankford (Democratic)
Unopposed

|- ! | William W. Larsen | | Democratic | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

William W. Larsen (Democratic)
Unopposed

Idaho

This was the first election in which Idaho was divided into districts, formerly it had had a single at-large district with two seats.

|- ! | Burton L. French Redistricted from the . | | Republican | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

Burton L. French (Republican) 63.35%
L. I. Purcell (Democratic) 36.66%

|- ! | Addison T. Smith Redistricted from the . | | Republican | 1912 | Incumbent re-elected. | nowrap | {{Plainlist|

Addison T. Smith (Republican) 63.16%
C. R. Jeppesen (Democratic) 36.84%

Illinois

|- ! | Martin B. Madden | | Republican | 1904 | Incumbent re-elected. | nowrap | {{Plainlist|

Martin B. Madden (Republican) 55.3%
George Mayer (Democratic) 43.0%
G. J. Carlisle (Socialist) 1.7%

|- ! | James R. Mann | | Republican | 1896 | Incumbent re-elected. | nowrap | {{Plainlist|

James R. Mann (Republican) 59.5%
Leo S. LeBosky (Democratic) 36.6%
Robert H. Howe (Socialist) 3.9%

|- ! | William W. Wilson | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

William W. Wilson (Republican) 52.9%
Fred J. Crowley (Democratic) 42.7%
Joseph A. Ambros (Socialist) 4.4%

|- ! | John W. Rainey | | Democratic | 1918 (special) | Incumbent re-elected. | nowrap | {{Plainlist|

John W. Rainey (Democratic) 94.6%
Carl G. Hoffman (Socialist) 5.4%

|- ! | Adolph J. Sabath | | Democratic | 1906 | Incumbent re-elected. | nowrap | {{Plainlist|

Adolph J. Sabath (Democratic) 69.1%
Louis C. Mau (Republican) 24.9%
Emil Jaeger (Socialist) 6.0%

|- ! | James McAndrews | | Democratic | 1912 | Incumbent re-elected. | nowrap | {{Plainlist|

James McAndrews (Democratic) 55.9%
Hervey C. Foster (Republican) 38.8%
William F. Kruse (Socialist) 5.3%

|- ! | Niels Juul | | Republican | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

Niels Juul (Republican) 51.3%
Frank M. Padden (Democratic) 38.0%
J. Louis Engdahl (Socialist) 10.7%

|- ! | Thomas Gallagher | | Democratic | 1908 | Incumbent re-elected. | nowrap | {{Plainlist|

Thomas Gallagher (Democratic) 78.2%
Dan Parrillo (Republican) 21.8%

|- ! | Frederick A. Britten | | Republican | 1912 | Incumbent re-elected. | nowrap | {{Plainlist|

Frederick A. Britten (Republican) 53.0%
James H. Poage (Democratic) 42.2%
Charles Kissling (Socialist) 4.7%

|- ! | George E. Foss | | Republican | 1914 | | Incumbent retired to run for U.S. Senator. Republican hold. | nowrap | {{Plainlist|

Carl R. Chindblom (Republican) 62.1%
Philip J. Finnegan (Democratic) 31.8%
Irving St. John Tucker (Socialist) 6.2%

|- ! | Ira C. Copley | | Republican | 1910 | Incumbent re-elected. | nowrap | {{Plainlist|

Ira C. Copley (Republican) 92.9%
Carl F. Schutz (Socialist) 7.1%

|- ! | Charles Eugene Fuller | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Charles Eugene Fuller (Republican) 93.4%
Oscar Ogren (Socialist) 6.6%

|- ! | John C. McKenzie | | Republican | 1910 | Incumbent re-elected. | nowrap | {{Plainlist|

John C. McKenzie (Republican) 96.2%
Shepherd H. Zimmerman (Socialist) 3.7%

|- ! | William J. Graham | | Republican | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

William J. Graham (Republican) 90.6%
Edmond B. Passmore (Socialist) 7.9%
Henry L. Wheelan (Prohibition) 1.5%

|- ! | Edward John King | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Edward John King (Republican) 60.2%
Edward P. Allen (Democratic) 37.1%
J. W. Connery (Socialist) 2.7%

|- ! | Clifford C. Ireland | | Republican | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

Clifford C. Ireland (Republican) 57.3%
Leander O. Eagleton (Democratic) 41.0%
J. J. Van Huss (Socialist) 1.7%

|- ! | John A. Sterling | | Republican | 1914 | | Incumbent died October 17, 1918. Republican hold. | nowrap | {{Plainlist|

Frank L. Smith (Republican) 69.7%
C. S. Schneider (Democratic) 30.3%

|- ! | Joseph G. Cannon | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Joseph G. Cannon (Republican) 60.3%
Frank M. Crangle (Democratic) 38.7%
Peter N. Christenson (Socialist) 1.0%

|- ! | William B. McKinley | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

William B. McKinley (Republican) 60.8%
Thomas B. Jack (Democratic) 38.1%
J. A. Bishop (Socialist) 1.1%

|- ! | Henry T. Rainey | | Democratic | 1902 | Incumbent re-elected. | nowrap | {{Plainlist|

Henry T. Rainey (Democratic) 55.0%
Frank E. Blane (Republican) 45.0%

|- ! | Loren E. Wheeler | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Loren E. Wheeler (Republican) 50.4%
James M. Graham (Democratic) 47.1%
James Bradley (Socialist) 2.5%

|- ! | William A. Rodenberg | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

William A. Rodenberg (Republican) 51.3%
J. Nick Perrin (Democratic) 43.5%
Marshal E. Fitzpatrick (Socialist) 5.2%

|- ! | Martin D. Foster | | Democratic | 1906 | | Incumbent lost re-election. Republican gain. | nowrap | {{Plainlist|

Edwin B. Brooks (Republican) 49.9%
Martin D. Foster (Democratic) 46.9%
Gustav Fritz (Socialist) 3.2%

|- ! | Thomas Sutler Williams | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Thomas Sutler Williams (Republican) 59.4%
James R. Campbell (Democratic) 39.4%
J. J. McGuinn (Socialist) 1.2%

|- ! | Edward E. Denison | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Edward E. Denison (Republican) 60.4%
Dempsey T. Woodard (Democratic) 39.6%

Richard Yates Jr. (Republican) 28.2%
William E. Mason (Republican) 27.0%
William E. Williams (Democratic) 20.3%
Michael H. Cleary (Democratic) 20.0%}} | Clarence C. Brooks (Socialist) 1.9% | Frank Watts (Socialist) 1.8% | Edward E. Blake (Prohibition) 0.2% | Charles P. Corson (Prohibition) 0.2% | William Hartness (Socialist Labor) 0.2% | Joseph Hamrie (Socialist Labor) 0.2%

Indiana

|- ! | George K. Denton | | Democratic | 1916 | | Incumbent lost re-election. Republican gain. | nowrap | {{Plainlist|

Oscar R. Luhring (Republican) 52.0%
George K. Denton (Democratic) 48.2%

|- ! | Oscar E. Bland | | Republican | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

Oscar E. Bland (Republican) 53.6%
Fred F. Bays (Democratic) 44.2%
Zimri W. Garten (Socialist) 2.2%

|- ! | William E. Cox | | Democratic | 1906 | | Incumbent lost re-election. Republican gain. | nowrap | {{Plainlist|

James W. Dunbar (Republican) 50.3%
William E. Cox (Democratic) 48.9%
Alvin L. Ogle (Socialist) 0.7%

|- ! | Lincoln Dixon | | Democratic | 1904 | | Incumbent lost re-election. Republican gain. | nowrap | {{Plainlist|

John S. Benham (Republican) 50.4%
Lincoln Dixon (Democratic) 49.6%

|- ! | Everett Sanders | | Republican | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

Everett Sanders (Republican) 50.5%
Ralph W. Moss (Democratic) 47.9%
J. Harvey Caldwell (Socialist) 1.7%

|- ! | Richard N. Elliott | | Republican | 1917 (special) | Incumbent re-elected. | nowrap | {{Plainlist|

Richard N. Elliott (Republican) 54.2%
Harry G. Strickland (Democratic) 45.3%
John Nipp (Socialist) 0.5%

|- ! | Merrill Moores | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Merrill Moores (Republican) 58.3%
Chalmer Schlosser (Democratic) 39.8%
William H. Henry (Socialist) 2.0%

|- ! | Albert H. Vestal | | Republican | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

Albert H. Vestal (Republican) 53.5%
William H. Eichorn (Democratic) 43.1%
George S. Martin (Socialist) 3.4%

|- ! | Fred S. Purnell | | Republican | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

Fred S. Purnell (Republican) 55.9%
Charles F. Howard (Democratic) 41.6%
John E. Brashear (Socialist) 1.3%
James Horn (Prohibition) 1.2%

|- ! | William R. Wood | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

William R. Wood (Republican) 61.4%
George R. Kirschman (Democratic) 37.4%
Erwin S. Whitmer (Socialist) 1.2%

|- ! | Milton Kraus | | Republican | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

Milton Kraus (Republican) 54.0%
George W. Rauch (Democratic) 44.0%
George Lanning (Socialist) 2.0%

|- ! | Louis W. Fairfield | | Republican | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

Louis W. Fairfield (Republican) 54.7%
Harry H. Hilgeman (Democratic) 43.1%
Henry Holman (Socialist) 2.2%

|- ! | Henry A. Barnhart | | Democratic | 1908 (special) | | Incumbent lost re-election. Republican gain. | nowrap | {{Plainlist|

Andrew J. Hickey (Republican) 52.8%
Henry A. Barnhart (Democratic) 45.1%
Warren Evans (Socialist) 2.1%

Iowa

|- ! | Charles A. Kennedy | | Republican | 1906 | Incumbent re-elected. | nowrap | {{Plainlist|

Charles A. Kennedy (Republican) 60.6%
Edward L. Hirsch (Democratic) 39.4%

|- ! | Harry E. Hull | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Harry E. Hull (Republican) 54.7%
Nathan D. Ely (Democratic) 39.5%
William E. McIntosh (Socialist) 5.9%

|- ! | Burton E. Sweet | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Burton E. Sweet (Republican) 64.7%
Harry B. Clark (Democratic) 35.3%

|- ! | Gilbert N. Haugen | | Republican | 1898 | Incumbent re-elected. | nowrap | {{Plainlist|

Gilbert N. Haugen (Republican) 64.7%
Joseph C. Campbell (Democratic) 35.3%

|- ! | James W. Good | | Republican | 1908 | Incumbent re-elected. | nowrap | {{Plainlist|

James W. Good (Republican) 65.1%
Sherman W. DeWolf (Democratic) 34.9%

|- ! | C. William Ramseyer | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

C. William Ramseyer (Republican) 56.1%
Buell McCash (Democratic) 42.6%
H. Grimes (Socialist) 1.3%

|- ! | Cassius C. Dowell | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Cassius C. Dowell (Republican) 66.8%
H. C. Evans (Democratic) 31.2%
Charles Gay (Socialist) 2.1%

|- ! | Horace M. Towner | | Republican | 1910 | Incumbent re-elected. | nowrap | {{Plainlist|

Horace M. Towner (Republican) 64.4%
D. Fulton Rice (Democratic) 35.6%

|- ! | William R. Green | | Republican | 1911 (special) | Incumbent re-elected. | nowrap | {{Plainlist|

William R. Green (Republican) 99.8%
Scattering 0.2%

|- ! | Frank P. Woods | | Republican | 1908 | | Incumbent lost renomination. Republican hold. | nowrap | {{Plainlist|

L. J. Dickinson (Republican) 64.2%
J. R. Files (Democratic) 35.8%

|- ! | George Cromwell Scott | | Republican | 1916 | | Incumbent retired. Republican hold. | nowrap | {{Plainlist|

William D. Boies (Republican) 56.4%
Thomas J. Steele (Democratic) 42.8%
G. F. Dietrich (Socialist) 0.8%

Kansas

|- ! | Daniel R. Anthony Jr. | | Republican | 1907 (special) | Incumbent re-elected. | nowrap | {{Plainlist|

Daniel R. Anthony Jr. (Republican) 65.0%
Frank E. Whitney (Democratic) 32.9%
George Stahlman (Socialist) 2.1%

|- ! | Edward C. Little | | Republican | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

Edward C. Little (Republican) 57.2%
Henderson S. Martin (Democratic) 40.8%
Gertrude Crumb Harman (Socialist) 2.0%

|- ! | Philip P. Campbell | | Republican | 1902 | Incumbent re-elected. | nowrap | {{Plainlist|

Philip P. Campbell (Republican) 54.8%
C. E. Pile (Democratic) 38.1%
S. J. Mattox (Socialist) 4.7%
Robert T. Herrick (Independent) 2.4%

|- ! | Dudley Doolittle | | Democratic | 1912 | | Incumbent lost re-election. Republican gain. | nowrap | {{Plainlist|

Homer Hoch (Republican) 58.8%
Dudley Doolittle (Democratic) 38.9%
W. S. Armour (Socialist) 2.2%

|- ! | Guy T. Helvering | | Democratic | 1912 | | Incumbent lost re-election. Republican gain. | nowrap | {{Plainlist|

James G. Strong (Republican) 60.8%
Guy T. Helvering (Democratic) 37.0%
Jake Myers (Socialist) 2.2%

|- ! | John R. Connelly | | Democratic | 1912 | | Incumbent lost re-election. Republican gain. | nowrap | {{Plainlist|

Hays B. White (Republican) 55.4%
John R. Connelly (Democratic) 41.7%
Dan Beddy (Socialist) 2.9%

|- ! | Jouett Shouse | | Democratic | 1914 | | Incumbent lost re-election. Republican gain. | nowrap | {{Plainlist|

Jasper N. Tincher (Republican) 56.2%
Jouett Shouse (Democratic) 41.1%
Mrs. Clyde Condron Jeffryes (Socialist) 2.7%

|- ! | William Augustus Ayres | | Democratic | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

William Augustus Ayres (Democratic) 51.2%
Charles C. Mack (Republican) 46.9%
S. O. Coble (Socialist) 1.9%

Kentucky

|- ! | Alben W. Barkley | | Democratic | 1912 | Incumbent re-elected. | nowrap | {{Plainlist|

Alben W. Barkley (Democratic) 66.8%
W. G. Howard (Republican) 33.2%

|- ! | David Hayes Kincheloe | | Democratic | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

David Hayes Kincheloe (Democratic) 57.7%
Ben T. Robinson (Republican) 42.3%

|- ! | Robert Y. Thomas Jr. | | Democratic | 1908 | Incumbent re-elected. | nowrap | {{Plainlist|

Robert Y. Thomas Jr. (Democratic) 52.3%
Bishop S. Huntsman (Republican) 47.7%

|- ! | Ben Johnson | | Democratic | 1906 | Incumbent re-elected. | nowrap | {{Plainlist|

Ben Johnson (Democratic) 52.4%
John P. Haswell (Republican) 47.6%

|- ! | J. Swagar Sherley | | Democratic | 1902 | | Incumbent lost re-election. ** Republican gain.** | nowrap | {{Plainlist|

Charles F. Ogden (Republican) 51.3%
J. Swagar Sherley (Democratic) 48.7%

|- ! | Arthur B. Rouse | | Democratic | 1910 | Incumbent re-elected. | nowrap | {{Plainlist|

Arthur B. Rouse (Democratic) 68.3%
Virgil Weaver (Republican) 31.7%

|- ! | J. Campbell Cantrill | | Democratic | 1908 | Incumbent re-elected. | nowrap | {{Plainlist|

J. Campbell Cantrill (Democratic) 60.9%
A. B. Hammond (Republican) 39.1%

|- ! | Harvey Helm | | Democratic | 1906 | Incumbent re-elected. | nowrap | {{Plainlist|

Harvey Helm (Democratic) 52.8%
Robert L. Davidson (Republican) 47.2%

|- ! | William J. Fields | | Democratic | 1910 | Incumbent re-elected. | nowrap | {{Plainlist|

William J. Fields (Democratic) 54.6%
Trumbo Snedegar (Republican) 45.4%

|- ! | John W. Langley | | Republican | 1906 | Incumbent re-elected. | nowrap | {{Plainlist|

John W. Langley (Republican) 67.1%
David Hays (Democratic) 32.9%

|- ! | Caleb Powers | | Republican | 1910 | | Incumbent retired. Republican hold. | nowrap | {{Plainlist|

John M. Robsion (Republican) 76.4%
Nat E. Elliott (Democratic) 23.6%

Louisiana

|- ! | Albert Estopinal | | Democratic | 1908 | Incumbent re-elected. | nowrap | {{Plainlist|

Albert Estopinal (Democratic)
Unopposed

|- ! | H. Garland Dupré | | Democratic | 1910 | Incumbent re-elected. | nowrap | {{Plainlist|

H. Garland Dupré (Democratic)
Unopposed

|- ! | Whitmell P. Martin | | Progressive | 1914 | | Incumbent re-elected as Democrat. Democratic gain. | nowrap | {{Plainlist|

Whitmell P. Martin (Democratic)
Unopposed

|- ! | John T. Watkins | | Democratic | 1904 | Incumbent re-elected. | nowrap | {{Plainlist|

John T. Watkins (Democratic)
Unopposed

|- ! | Riley J. Wilson | | Democratic | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Riley J. Wilson (Democratic)
Unopposed

|- ! | Jared Y. Sanders Sr. | | Democratic | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

Jared Y. Sanders Sr. (Democratic)
Unopposed

|- ! | Ladislas Lazaro | | Democratic | 1912 | Incumbent re-elected. | nowrap | {{Plainlist|

Ladislas Lazaro (Democratic)
Unopposed

|- ! | James Benjamin Aswell | | Democratic | 1912 | Incumbent re-elected. | nowrap | {{Plainlist|

James Benjamin Aswell (Democratic)
Unopposed

Maine

|- ! | Louis B. Goodall | | Republican | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

Louis B. Goodall (Republican) 53.8%
L. B. Swett (Democratic) 46.2%

|- ! | Wallace H. White | | Republican | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

Wallace H. White (Republican) 54.2%
Daniel J. McGillicuddy (Democratic) 45.8%

|- ! | John A. Peters | | Republican | 1913 (special) | Incumbent re-elected. | nowrap | {{Plainlist|

John A. Peters (Republican) 57.6%
Edward Chase (Democratic) 42.4%

|- ! | Ira G. Hersey | | Republican | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

Ira G. Hersey (Republican) 58.1%
Leon G. Brown (Democratic) 41.9%

Maryland

|- ! | Jesse Price | | Democratic | 1914 | | Incumbent lost re-election. Republican gain. | nowrap | {{Plainlist|

William N. Andrews (Republican) 50.5%
Jesse Price (Democratic) 49.5%

|- ! | J. Frederick C. Talbott | | Democratic | 1902 | | Incumbent died October 5, 1918. Democratic hold. | nowrap | {{Plainlist|

Carville Benson (Democratic) 54.3%
Charles J. Hull (Republican) 44.6%
William H. Champlin (Socialist) 1.1%

|- ! | Charles P. Coady | | Democratic | 1912 | Incumbent re-elected. | nowrap | {{Plainlist|

Charles P. Coady (Democratic) 58.4%
Charles A. Jording (Republican) 38.8%
William A. Toole (Socialist) 2.8%

|- ! | J. Charles Linthicum | | Democratic | 1910 | Incumbent re-elected. | nowrap | {{Plainlist|

J. Charles Linthicum (Democratic) 57.0%
Walter E. Knickman (Republican) 41.6%
Charles B. Lazzell (Socialist) 1.4%

|- ! | Sydney Emanuel Mudd II | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Sydney Emanuel Mudd II (Republican) 53.7%
Frank M. Duvall (Democratic) 44.5%
James L. Smiley (Socialist) 1.9%

|- ! | Frederick N. Zihlman | | Republican | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

Frederick N. Zihlman (Republican) 54.9%
Henry Dorsey Etchison (Democratic) 42.4%
Sylvester L. V. Young (Socialist) 2.6%

Massachusetts

|- ! | Allen T. Treadway | | Republican | 1912 | Incumbent re-elected. | nowrap | {{Plainlist|

Allen T. Treadway (Republican) 58.30%
Thomas F. Cassidy (Democratic) 41.70%

|- ! | Frederick H. Gillett | | Republican | 1892 | Incumbent re-elected. | nowrap | {{Plainlist|

Frederick H. Gillett (Republican) 99.93%

|- ! | Calvin Paige | | Republican | 1913 (special) | Incumbent re-elected. | nowrap | {{Plainlist|

Calvin Paige (Republican) 60.47%
Eaton D. Sargent (Democratic) 39.53%

|- ! | Samuel Winslow | | Republican | 1912 | Incumbent re-elected. | nowrap | {{Plainlist|

Samuel Winslow (Republican) 52.50%
John F. McGrath (Democratic) 47.49%

|- ! | John Jacob Rogers | | Republican | 1912 | Incumbent re-elected. | nowrap | {{Plainlist|

John Jacob Rogers (Republican) 99.23%

|- ! | Willfred W. Lufkin | | Republican | 1917 (special) | Incumbent re-elected. | nowrap | {{Plainlist|

Willfred W. Lufkin (Republican) 88.86%
Estus E. Eames (Socialist) 11.13%

|- ! | Michael F. Phelan | | Democratic | 1912 | Incumbent re-elected. | nowrap | {{Plainlist|

Robert S. Maloney (Democratic) 57.31%
Charles Cabot Johnson (Republican) 42.69%

|- ! | Frederick W. Dallinger | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Frederick W. Dallinger (Republican) 60.31%
James E. Aylward (Democratic) 39.69%

|- ! | Alvan T. Fuller | | Republican | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

Alvan T. Fuller (Republican) 68.69%
Henry C. Rowland (Democratic) 31.31%

|- ! rowspan=2 | | | Incumbent Democrat lost re-election as an Independent challenger. Democratic hold. | nowrap | {{Plainlist|

John F. Fitzgerald (Democratic) 47.28%
Peter Francis Tague (Independent) 45.72%
Hammond T. Fletcher (Republican) 6.99% |- | | Election successfully contested. Incumbent re-seated October 23, 1919. Democratic hold. | nowrap | {{Plainlist|
Peter Francis Tague (Democrat as Independent)
John F. Fitzgerald (Democratic)

|- ! | George H. Tinkham | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

George H. Tinkham (Republican) 56.43%
Francis J. Horgan (Democratic) 43.55%

|- ! | James A. Gallivan | | Democratic | 1914 (special) | Incumbent re-elected. | nowrap | {{Plainlist|

James A. Gallivan (Democratic) 70.41%
Harrison H. Atwood (Republican) 29.58%

|- ! | William Henry Carter | | Republican | 1914 | | Incumbent retired. Republican hold. | nowrap | {{Plainlist|

Robert Luce (Republican) 59.28%
Aloysius J. Doon (Democratic) 40.71%

|- ! | Richard Olney | | Democratic | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Richard Olney (Democratic) 56.56%
Louis F. R. Langelier (Republican) 43.44%

|- ! | William S. Greene | | Republican | 1898 (special) | Incumbent re-elected. | nowrap | {{Plainlist|

William S. Greene (Republican) 61.73%
Arthur J. B. Cartier (Democratic) 38.27%

|- ! | Joseph Walsh | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Joseph Walsh (Republican) 62.40%
Frederic Tudor (Democratic) 37.59%

Michigan

|- ! | Frank E. Doremus | | Democratic | 1910 | Incumbent re-elected. | nowrap | {{Plainlist|

Frank E. Doremus (Republican) 60.3%
James W. Hanley (Democratic) 37.6%
Nathan M. Welch (Socialist) 2.0%

|- ! | Samuel Beakes | | Democratic | 1912 | | Incumbent lost re-election. Republican gain. | nowrap | {{Plainlist|

Earl C. Michener (Republican) 55.7%
Samuel Beakes (Democratic) 43.5%}} | Milton V. Breitmayer (Socialist) 0.7% | Ernest J. Moore (Socialist Labor) 0.1%

|- ! | John M. C. Smith | | Republican | 1910 | Incumbent re-elected. | nowrap | {{Plainlist|

John M. C. Smith (Republican) 61.7%
Howard W. Cavanagh (Democratic) 36.9%}} | Will H. Ressequie (Socialist) 1.3% | W. Spencer (Unknown) 0.1%

|- ! | Edward L. Hamilton | | Republican | 1896 | Incumbent re-elected. | nowrap | {{Plainlist|

Edward L. Hamilton (Republican) 65.8%
James O'Hara (Democratic) 34.2%

|- ! | Carl E. Mapes | | Republican | 1912 | Incumbent re-elected. | nowrap | {{Plainlist|

Carl E. Mapes (Republican) 66.8%
Peter J. Danhof (Democratic) 31.5%
George W. Eldredge (Socialist) 1.7%

|- ! | Patrick H. Kelley | | Republican | 1912 | Incumbent re-elected. | nowrap | {{Plainlist|

Patrick H. Kelley (Republican) 97.3%
Oscar Sand (Socialist) 2.7%

|- ! | Louis C. Cramton | | Republican | 1912 | Incumbent re-elected. | nowrap | {{Plainlist|

Louis C. Cramton (Republican) 73.3%
John W. Scully (Democratic) 25.5%
John Dubel (Socialist) 1.2%

|- ! | Joseph W. Fordney | | Republican | 1898 | Incumbent re-elected. | nowrap | {{Plainlist|

Joseph W. Fordney (Republican) 62.8%
Miles J. Purcell (Democratic) 37.2%

|- ! | James C. McLaughlin | | Republican | 1906 | Incumbent re-elected. | nowrap | {{Plainlist|

James C. McLaughlin (Republican) 66.4%
Charles M. Black (Democratic) 31.3%
Edward Genia (Socialist) 2.3%

|- ! | Gilbert A. Currie | | Republican | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

Gilbert A. Currie (Republican) 68.0%
Henry C. Haller (Democratic) 30.7%
George Aplin (Socialist) 1.3%

|- ! | Frank D. Scott | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Frank D. Scott (Republican) 66.7%
Michael J. Doyle (Democratic) 33.3%

|- ! | W. Frank James | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

W. Frank James (Republican) 69.8%
Albert S. Ley (Democratic) 26.9%
John Kuskila (Socialist) 3.2%

|- ! | Charles Archibald Nichols | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Charles Archibald Nichols (Republican) 66.9%
Louis W. McClear (Democratic) 31.7%
Maurice Sugar (Socialist) 1.4%

Minnesota

|- ! | Sydney Anderson | | Republican | 1910 | Incumbent re-elected. | nowrap | {{Plainlist|

Sydney Anderson (Republican)
Unopposed

|- ! | Franklin Ellsworth | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Franklin Ellsworth (Republican) 69.0%
Frank Simon (Democratic) 31.0%

|- ! | Charles Russell Davis | | Republican | 1902 | Incumbent re-elected. | nowrap | {{Plainlist|

Charles Russell Davis (Republican) 53.4%
John J. Farrell (Democratic) 46.6%

|- ! | Carl Van Dyke | | Democratic | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Carl Van Dyke (Democratic) 62.0%
Walter Mallory (Republican) 38.0%

|- ! | Ernest Lundeen | | Republican | 1916 | | Incumbent lost renomination. Republican hold. | nowrap | {{Plainlist|

Walter Newton (Republican) 57.6%
James Robertson (Democratic) 42.4%

|- ! | Harold Knutson | | Republican | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

Harold Knutson (Republican) 72.3%
P. J. Russell (Democratic) 27.7%

|- ! | Andrew Volstead | | Republican | 1902 | Incumbent re-elected. | nowrap | {{Plainlist|

Andrew Volstead (Republican) 56.3%
Engebret E. Lobeck (National) 43.7%

|- ! | Clarence B. Miller | | Republican | 1908 | | Incumbent lost re-election. Farmer–Labor gain. | nowrap | {{Plainlist|

William L. Carss (Farmer–Labor) 57.1%
Clarence B. Miller (Republican) 42.9%

|- ! | Halvor Steenerson | | Republican | 1902 | Incumbent re-elected. | nowrap | {{Plainlist|

Halvor Steenerson (Republican)
Unopposed

|- ! | Thomas D. Schall | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Thomas D. Schall (Republican) 71.1%
Henry A. Finlayson (Democratic) 28.9%

Mississippi

|- ! | Ezekiel S. Candler Jr. | | Democratic | 1900 | Incumbent re-elected. | nowrap | {{Plainlist|

Ezekiel S. Candler Jr. (Democratic)
Unopposed

|- ! | Hubert D. Stephens | | Democratic | 1910 | Incumbent re-elected. | nowrap | {{Plainlist|

Hubert D. Stephens (Democratic)
Unopposed

|- ! | Benjamin G. Humphreys II | | Democratic | 1902 | Incumbent re-elected. | nowrap | {{Plainlist|

Benjamin G. Humphreys II (Democratic)
Unopposed

|- ! | Thomas U. Sisson | | Democratic | 1908 | Incumbent re-elected. | nowrap | {{Plainlist|

Thomas U. Sisson (Democratic) 96.3%
J. G. Adams (Socialist) 3.7%

|- ! | William W. Venable | | Democratic | 1916 (special) | Incumbent re-elected. | nowrap | {{Plainlist|

William W. Venable (Democratic)
Unopposed

|- ! | Pat Harrison | | Democratic | 1910 | | Incumbent retired to run for U.S. Senator. Democratic hold. | nowrap | {{Plainlist|

Paul B. Johnson Sr. (Democratic) 94.3%
F. T. Maxwell (Socialist) 5.7%

|- ! | Percy Quin | | Democratic | 1912 | Incumbent re-elected. | nowrap | {{Plainlist|

Percy Quin (Democratic) 93.4%
J. B. Sternberger (Socialist) 6.6%

|- ! | James W. Collier | | Democratic | 1908 | Incumbent re-elected. | nowrap | {{Plainlist|

James W. Collier (Democratic) 98.8%
W. T. Roberts (Unknown) 1.2%

Missouri

|- ! | Milton A. Romjue | | Democratic | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

Milton A. Romjue (Democratic) 54.19%
Frank C. Millspaugh (Republican) 44.95%
Edward H. Willey (Socialist) 0.86%

|- ! | William W. Rucker | | Democratic | 1898 | Incumbent re-elected. | nowrap | {{Plainlist|

William W. Rucker (Democratic) 98.70%
George H. Cox (Socialist) 0.89%
Don C. McVay (Republican write-in) 0.40%

|- ! | Joshua W. Alexander | | Democratic | 1906 | Incumbent re-elected. | nowrap | {{Plainlist|

Joshua W. Alexander (Democratic) 52.89%
John E. Frost (Republican) 46.93%
William Garrett (Socialist) 0.18%

|- ! | Charles F. Booher | | Democratic | 1906 | Incumbent re-elected. | nowrap | {{Plainlist|

Charles F. Booher (Democratic) 51.67%
J. C. McNeeley (Republican) 48.02%
Joseph Kunzelman (Socialist) 0.31%

|- ! | William P. Borland | | Democratic | 1908 | | Incumbent lost renomination. Democratic hold. | nowrap | {{Plainlist|

William T. Bland (Democratic) 62.71%
Albert L. Reeves (Republican) 36.84%
William J. Adams (Socialist) 0.45%

|- ! | Clement C. Dickinson | | Democratic | 1910 (special) | Incumbent re-elected. | nowrap | {{Plainlist|

Clement C. Dickinson (Democratic) 52.71%
William O. Atkeson (Republican) 46.66%
Louis Schneider (Socialist) 0.63%

|- ! | Courtney W. Hamlin | | Democratic | 1906 | | Incumbent lost renomination. Democratic hold. | nowrap | {{Plainlist|

Samuel C. Major (Democratic) 49.75%
James D. Salts (Republican) 49.56%
Jonathan H. Allison (Socialist) 0.69%

|- ! | Dorsey W. Shackleford | | Democratic | 1899 (special) | | Incumbent lost renomination. Democratic hold. | nowrap | {{Plainlist|

William L. Nelson (Democratic) 50.36%
North Todd Gentry (Republican) 49.64%

|- ! | Champ Clark | | Democratic | 1896 | Incumbent re-elected. | nowrap | {{Plainlist|

Champ Clark (Democratic) 51.68%
Bernard H. Dyer (Republican) 47.35%
Henry Shumaker (Socialist) 0.97%

|- ! | Jacob E. Meeker | | Republican | 1914 | | Incumbent died October 16, 1918. Republican hold. Winner was not elected to finish the term; see above. | nowrap | {{Plainlist|

Cleveland A. Newton (Republican) 60.17%
Harlow E. Read (Democratic) 35.92%
William M. Brandt (Socialist) 3.56%
Ernest Snavely (Socialist Labor) 0.35%

|- ! | William L. Igoe | | Democratic | 1912 | Incumbent re-elected. | nowrap | {{Plainlist|

William L. Igoe (Democratic) 96.76%
Will C. Long (Socialist) 3.17%

|- ! | Leonidas C. Dyer | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Leonidas C. Dyer (Republican) 58.91%
Samuel Rosenfeld (Democratic) 39.88%}} | Chris Rocker (Socialist) 1.05% | Karl Oberheu (Socialist Labor) 0.16%

|- ! | Walter Lewis Hensley | | Democratic | 1910 | | Incumbent retired. Republican gain. | nowrap | {{Plainlist|

Marion E. Rhodes (Republican) 51.41%
Arthur T. Brewster (Democratic) 47.92%
William Cunningham (Socialist) 0.66%

|- ! | Joseph J. Russell | | Democratic | 1910 | | Incumbent lost re-election. Republican gain. | nowrap | {{Plainlist|

Edward D. Hays (Republican) 50.53%
Joseph J. Russell (Democratic) 49.42%
James Campbell (Socialist) 0.05%

|- ! | Perl D. Decker | | Democratic | 1912 | | Incumbent lost re-election. Republican gain. | nowrap | {{Plainlist|

Isaac V. McPherson (Republican) 51.00%
Perl D. Decker (Democratic) 47.52%
David Landis (Socialist) 1.48%

|- ! | Thomas L. Rubey | | Democratic | 1910 | Incumbent re-elected. | nowrap | {{Plainlist|

Thomas L. Rubey (Democratic) 49.85%
Samuel A. Shelton (Republican) 49.22%
Henry M. Fouty (Socialist) 0.93%

Montana

John M. Evans (Democratic) 47.9%
Frank B. Linderman (Republican) 42.1%
Tom Kane (National) 10.0%

|- ! | | New seat. Republican gain. | nowrap | {{Plainlist|

Carl W. Riddick (Republican) 49.4%
Harry B. Mitchell (Democratic) 45.1%
Joseph Pope (National) 5.5%

Nebraska

|- ! | C. Frank Reavis | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

C. Frank Reavis (Republican) 62.3%
Frank A. Peterson (Democratic) 37.7%

|- ! | Charles O. Lobeck | | Democratic | 1910 | | Incumbent lost re-election. Republican gain. | nowrap | {{Plainlist|

Albert W. Jefferis (Republican) 50.9%
Charles O. Lobeck (Democratic) 49.1%

|- ! | Dan V. Stephens | | Democratic | 1911 (special) | | Incumbent lost re-election. Republican gain. | nowrap | {{Plainlist|

Robert E. Evans (Republican) 52.0%
Dan V. Stephens (Democratic) 48.0%

|- ! | Charles H. Sloan | | Republican | 1910 | | Incumbent retired. Republican hold. | nowrap | {{Plainlist|

Melvin O. McLaughlin (Republican) 58.1%
William H. Smith (Democratic) 40.8%
Thomas C. Birmingham (Prohibition) 1.1%

|- ! | Ashton C. Shallenberger | | Democratic | 1914 | | Incumbent lost re-election. Republican gain. | nowrap | {{Plainlist|

William E. Andrews (Republican) 50.8%
Ashton C. Shallenberger (Democratic) 49.2%

|- ! | Moses Kinkaid | | Republican | 1902 | Incumbent re-elected. | nowrap | {{Plainlist|

Moses Kinkaid (Republican) 60.8%
Charles W. Pool (Democratic) 60.8%
Lincoln Steffins (Prohibition) 1.3%

Nevada

|- ! | Edwin E. Roberts | | Republican | 1910 | | Incumbent retired to run for U.S. Senator. Democratic gain. | nowrap | {{Plainlist|

Charles R. Evans (Democratic) 51.3%
Sylvester S. Downer (Republican) 43.1%
H. H. Cordill (Socialist) 5.6%

New Hampshire

|- ! | Sherman Everett Burroughs | | Republican | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

Sherman Everett Burroughs (Republican) 52.14%
William N. Rogers (Democratic) 47.85%

|- ! | Edward Hills Wason | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Edward Hills Wason (Republican) 56.45%
Harry F. Lake (Democratic) 43.55%

New Jersey

|- ! | William J. Browning | | Republican | 1911 (special) | Incumbent re-elected. | nowrap | {{Plainlist|

William J. Browning (Republican) 63.8%
Edward S. Dickerson (Democratic) 28.5%
Charles E. Lane (Prohibition) 4.9%
George F. Noftsker (Socialist) 2.8%

|- ! | Isaac Bacharach | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Isaac Bacharach (Republican) 67.9%
John T. French (Democratic) 28.2%
Levi B. Sharp (Prohibition) 3.9%

|- ! | Thomas J. Scully | | Democratic | 1910 | Incumbent re-elected. | nowrap | {{Plainlist|

Thomas J. Scully (Democratic) 53.1%
Robert Carson (Republican) 45.4%
James G. Mason (Prohibition) 1.6%

|- ! | Elijah C. Hutchinson | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Elijah C. Hutchinson (Republican) 55.1%
George O. Vanerbilt (Democratic) 44.9%

|- ! | John H. Capstick | | Republican | 1914 | | Incumbent died March 17, 1918. Republican hold. | nowrap | {{Plainlist|

Ernest R. Ackerman (Republican) 52.6%
Richard E. Clement (Democratic) 40.7%
James B. Furber (Socialist) 5.3%
William H. Clarke (Prohibition) 1.4%

|- ! | John R. Ramsey | | Republican | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

John R. Ramsey (Republican) 53.3%
Robert A. Sibbald (Democratic) 44.4%
Charles P. DeYoe (Prohibition) 2.3%

|- ! | Dow H. Drukker | | Republican | 1914 (special) | | Incumbent retired. Republican hold. | nowrap | {{Plainlist|

Amos H. Radcliffe (Republican) 53.6%
Joseph A. Delaney (Democratic) 36.7%
William H. Derrick (Socialist) 7.1%}} | Charles M. Berdan (Prohibition) 1.7% | Anderson (National) 0.9%

|- ! | Edward W. Gray | | Republican | 1914 | | Incumbent retired to run for U.S. Senator. Democratic gain. | nowrap | {{Plainlist|

Cornelius A. McGlennon (Democratic) 52.4%
William B. Ross (Republican) 43.6%
William K. Tallon (Socialist) 4.0%

|- ! | Richard W. Parker | | Republican | 1914 (special) | | Incumbent lost re-election. Democratic gain. | nowrap | {{Plainlist|

Daniel F. Minahan (Democratic) 50.4%
Richard W. Parker (Republican) 42.8%
Steven Bircher (Socialist) 6.0%
Benjamin F. Biershing (Independent) 0.8%

|- ! | Frederick R. Lehlbach | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Frederick R. Lehlbach (Republican) 48.3%
Dallas Flanagan (Democratic) 46.1%
Charles H. Poole (Socialist) 5.6%

|- ! | John J. Eagan | | Democratic | 1912 | Incumbent re-elected. | nowrap | {{Plainlist|

John J. Eagan (Democratic) 67.5%
Edward Brennan (Republican) 23.5%
Gertrude Reilly (Socialist) 9.0%

|- ! | James A. Hamill | | Democratic | 1906 | Incumbent re-elected. | nowrap | {{Plainlist|

James A. Hamill (Democratic) 70.8%
Theodore L. Bierch (Republican) 24.1%
Valentine Bausch (Socialist) 5.1%

New Mexico

|- ! | William B. Walton | | Democratic | 1916 | | Incumbent retired to run for U.S. Senator. Republican gain. | nowrap | {{Plainlist|

Benigno C. Hernández (Republican) 50.7%
Granville A. Richardson (Democratic) 48.1%
W. B. Dillon (Socialist) 1.2%

New York

|- ! | Frederick C. Hicks | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Frederick C. Hicks (Republican) 96.6%
George Sieburg (Socialist) 3.4%

|- ! | C. Pope Caldwell | | Democratic | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

C. Pope Caldwell (Democratic) 85.9%
William Burkle (Socialist) 14.1%

|- ! | Joseph V. Flynn | | Democratic | 1914 | | Incumbent retired. Republican gain. | nowrap | {{Plainlist|

John MacCrate (Republican) 48.9%
Michael Fogarty (Independent) 34.1%
Joseph A. Whitehorn (Socialist) 17.0%

|- ! | John J. Delaney Redistricted from the | | Democratic | 1918 (special) | | Incumbent retired. Democratic hold. | nowrap | {{Plainlist|

Thomas H. Cullen (Democratic) 75.2%
Ralph Waldo Bowman (Republican) 21.4%
George S. Rumpler (Socialist) 3.3%

|- ! | | New seat. Democratic gain. | nowrap | {{Plainlist|

John B. Johnston (Democratic) 55.8%
George A. Green (Republican) 41.5%
Hugo Peters (Socialist) 2.7%

|- ! | Frederick W. Rowe | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Frederick W. Rowe (Republican) 46.6%
Franklin Taylor (Democratic) 46.0%
Bernard J. Riley (Socialist) 7.4%

James P. Maher (Democratic) 58.9%
John Hill Morgan (Republican) 27.7%
James O'Neal (Socialist) 13.4%

|- ! | William E. Cleary | | Democratic | 1918 (special) | Incumbent re-elected. | nowrap | {{Plainlist|

William E. Cleary (Democratic) 54.5%
Allison L. Adams (Republican) 33.5%
Abraham H. Shulman (Socialist) 11.6%
Robert E. Neidig (Prohibition) 0.4%

|- ! | Oscar W. Swift | | Republican | 1914 | | Incumbent lost re-election. Democratic gain. | nowrap | {{Plainlist|

David J. O'Connell (Democratic) 45.8%
Oscar W. Swift (Republican) 43.5%
Wilhelmus B. Robinson (Socialist) 10.7%

|- ! | Reuben L. Haskell | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Reuben L. Haskell (Republican) 40.2%
George W. Martin (Democratic) 36.7%
Abraham I. Shiplacoff (Socialist) 23.0%

|- ! | Daniel J. Riordan | | Democratic | 1906 (special) | Incumbent re-elected. | nowrap | {{Plainlist|

Daniel J. Riordan (Democratic) 71.2%
William H. Michales (Republican) 23.4%
Elinor Byrns (Socialist) 4.1%
George Weber (Prohibition) 1.3%

|- ! | Meyer London | | Socialist | 1914 | | Incumbent lost re-election. Democratic gain. | nowrap | {{Plainlist|

Henry M. Goldfogle (Democratic) 52.9%
Meyer London (Socialist) 47.0%}} | Wilbur F. Rawlins (Prohibition) 0.1% | Benjamin W. Burger (Independent) 0.0%

|- ! | Christopher D. Sullivan | | Democratic | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

Christopher D. Sullivan (Democratic) 66.4%
Algernon Lee (Socialist) 33.4%
Flavius J. Perry (Prohibition) 0.3%

|- ! | Fiorello La Guardia | | Republican | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

Fiorello La Guardia (Republican) 69.7%
Scott Nearing (Socialist) 29.8%
Alfred H. Saunders (Prohibition) 0.4%

|- ! | Peter J. Dooling Redistricted from the | | Democratic | 1912 | Incumbent re-elected. | nowrap | {{Plainlist|

Peter J. Dooling (Democratic) 78.4%
Jacob I. Wiener (Republican) 17.9%
Fanny Witherspoon (Socialist) 3.2%
Herbert D. Burnham (Prohibition) 0.5%

|- ! | Thomas Francis Smith Redistricted from the | | Democratic | 1917 (special) | Incumbent re-elected. | nowrap | {{Plainlist|

Thomas Francis Smith (Democratic) 71.9%
Thomas Rock (Republican) 20.9%
Samuel E. Beardsley (Socialist) 6.9%
James F. Gillespie (Prohibition) 0.3%

|- ! | George B. Francis Redistricted from the | | Republican | 1916 | | Incumbent retired. Democratic gain. | nowrap | {{Plainlist|

Herbert Pell (Democratic) 50.2%
Frederick C. Tanner (Republican) 45.7%
Julius Halpern (Socialist) 3.7%
Richard G. Green (Prohibition) 0.3%

|- ! | John F. Carew Redistricted from the | | Democratic | 1912 | Incumbent re-elected. | nowrap | {{Plainlist|

John F. Carew (Democratic) 71.2%
Julius M. Leder (Republican) 14.4%
Pauline Newman (Socialist) 14.2%
Claude Maybell (Prohibition) 0.2%

|- ! | Walter M. Chandler | | Republican | 1912 | | Incumbent lost re-election. Democratic gain. | nowrap | {{Plainlist|

Joseph Rowan (Democratic) 48.3%
Walter M. Chandler (Republican) 44.8%
Theresa Malkiel (Socialist) 6.4%
Ralph E. Myers (Prohibition) 0.5%

|- ! | Isaac Siegel | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Isaac Siegel (Republican) 60.9%
Morris Hillquit (Socialist) 38.8%
Charles H. Simmons (Prohibition) 0.2%

|- ! | Jerome F. Donovan | | Democratic | 1918 (special) | Incumbent re-elected. | nowrap | {{Plainlist|

Jerome F. Donovan (Democratic) 53.4%
John A. Bolles (Republican) 41.2%
George Frazier Miller (Socialist) 5.1%
Edward A. Packer (Prohibition) 0.3%

|- ! | Anthony J. Griffin | | Democratic | 1918 (special) | Incumbent re-elected. | nowrap | {{Plainlist|

Anthony J. Griffin (Democratic) 69.9%
Sadie Kost (Republican) 16.2%
Patrick J. Murphy (Socialist) 13.3%
John G. Tait (Prohibition) 0.5%

|- ! | Daniel C. Oliver | | Democratic | 1916 | | Incumbent retired. Democratic hold. | nowrap | {{Plainlist|

Richard F. McKiniry (Democratic) 55.2%
Owen A. Haley (Republican) 25.1%
Max Geisler (Socialist) 19.7%

|- ! | Benjamin L. Fairchild | | Republican | 1916 | | Incumbent lost re-election. Democratic gain. | nowrap | {{Plainlist|

James V. Ganly (Democratic) 44.3%
Benjamin L. Fairchild (Republican) 41.8%
Irvin E. Klein (Socialist) 13.9%

|- ! | James W. Husted | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

James W. Husted (Republican) 56.2%
Arthur O. Sherman (Democratic) 40.5%
Bradford Jones (Socialist) 2.5%
Collin F. Jewell (Prohibition) 0.8%

|- ! | Edmund Platt | | Republican | 1912 | Incumbent re-elected. | nowrap | {{Plainlist|

Edmund Platt (Republican) 57.1%
George A. Coleman (Democratic) 39.4%}} | Elbert Knapp (Prohibition) 1.8% | Alfred C. Perkins (Socialist) 1.7%

|- ! | Charles B. Ward | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Charles B. Ward (Republican) 53.8%
John K. Evans (Democratic) 44.7%
Rolland E. Miles (Socialist) 1.4%

|- ! | Rollin B. Sanford | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Rollin B. Sanford (Republican) 54.5%
Joseph A. Lawson (Democratic) 43.8%
Allen C. Depew (Socialist) 1.8%

|- ! | James S. Parker | | Republican | 1912 | Incumbent re-elected. | nowrap | {{Plainlist|

James S. Parker (Republican) 62.3%
Gustavus A. Rogers (Democratic) 34.3%
Charles E. Robbins (Prohibition) 2.0%
D. V. Linehan (Socialist) 1.4%

|- ! | George R. Lunn | | Democratic | 1916 | | Incumbent lost re-election. ** Republican gain.** | nowrap | {{Plainlist|

Frank Crowther (Republican) 47.9%
George R. Lunn (Democratic) 46.7%
Herbert M. Merrill (Socialist) 5.5%

|- ! | Bertrand Snell | | Republican | 1915 (special) | Incumbent re-elected. | nowrap | {{Plainlist|

Bertrand Snell (Republican) 71.6%
Elizabeth Arthur (Democratic) 24.4%
Franklin D. Wallace (Prohibition) 3.7%
Samuel G. Cline (Socialist) 0.3%

|- ! | Luther W. Mott | | Republican | 1910 | Incumbent re-elected. | nowrap | {{Plainlist|

Luther W. Mott (Republican) 63.2%
Charles A. Hitchcock (Democratic) 30.2%
Stephen R. Lockwood (Prohibition) 5.6%
George H. Rockburn (Socialist) 1.0%

|- ! | Homer P. Snyder | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Homer P. Snyder (Republican) 54.0%
Clarence E. Williams (Democratic) 40.5%
Enoch Ochstrand (Prohibition) 2.9%
John Latimore (Socialist) 2.5%

|- ! | George W. Fairchild | | Republican | 1906 | | Incumbent retired. Republican hold. | nowrap | {{Plainlist|

William H. Hill (Republican) 57.4%
Lavern P. Butts (Democratic) 32.4%
Julius E. Rogers (Prohibition) 9.5%
Arthur G. Breckinridge (Socialist) 0.7%

|- ! | Walter W. Magee | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Walter W. Magee (Republican) 59.3%
Ben Wiles (Democratic) 32.4%
Edward G. Dietrich (Prohibition) 4.4%
Frank Heck (Socialist) 3.9%

|- ! | Norman J. Gould | | Republican | 1915 (special) | Incumbent re-elected. | nowrap | {{Plainlist|

Norman J. Gould (Republican) 70.9%
Everett E. Calman (Democratic) 29.1%

|- ! | Harry H. Pratt | | Republican | 1914 | | Incumbent lost renomination. Republican hold. | nowrap | {{Plainlist|

Alanson B. Houghton (Republican) 62.9%
Frederick W. Palmer (Democratic) 35.8%
Chauncey L. Hurlbut (Socialist) 1.4%

|- ! | Thomas B. Dunn | | Republican | 1912 | Incumbent re-elected. | nowrap | {{Plainlist|

Thomas B. Dunn (Republican) 62.1%
Jacob Gerling (Democratic) 27.8%
John W. Dennis (Socialist) 6.9%
Algernon S. Cropsey (Prohibition) 3.2%

|- ! | Archie D. Sanders | | Republican | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

Archie D. Sanders (Republican) 68.9%
Clara B. Mann (Democratic) 28.8%
George Weber (Socialist) 2.4%

|- ! | S. Wallace Dempsey | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

S. Wallace Dempsey (Republican) 63.0%
Matthew P. Young (Democratic) 31.7%
Lee P. Smith (Socialist) 5.4%

|- ! | Charles Bennett Smith | | Democratic | 1910 | | Incumbent lost re-election. Republican gain. | nowrap | {{Plainlist|

Clarence MacGregor (Republican) 41.2%
Charles B. Smith (Democratic) 41.2%
Franklin P. Brill (Socialist) 17.6%

|- ! | William F. Waldow | | Republican | 1916 | | Incumbent lost re-election. Democratic gain. | nowrap | {{Plainlist|

James M. Mead (Democratic) 46.2%
William F. Waldow (Republican) 43.2%
Hattie Kreuger (Socialist) 8.7%
John H. Stoody (Prohibition) 1.8%

|- ! | Charles Mann Hamilton | | Republican | 1912 | | Incumbent retired. Republican hold. | nowrap | {{Plainlist|

Daniel A. Reed (Republican) 73.4%
Frank H. Mott (Democratic) 23.3%
Gust C. Peterson (Socialist) 3.3%

North Carolina

|- ! | John Humphrey Small | | Democratic | 1898 | Incumbent re-elected. | nowrap | {{Plainlist|

John Humphrey Small (Democratic) 75.4%
C. R. Pugh (Republican) 24.6%

|- ! | Claude Kitchin | | Democratic | 1900 | Incumbent re-elected. | nowrap | {{Plainlist|

Claude Kitchin (Democratic)
Unopposed

|- ! | George E. Hood | | Democratic | 1914 | | Incumbent retired. Democratic hold. | nowrap | {{Plainlist|

Samuel M. Brinson (Democratic) 59.3%
Claude R. Wheatley (Republican) 40.7%

|- ! | Edward W. Pou | | Democratic | 1900 | Incumbent re-elected. | nowrap | {{Plainlist|

Edward W. Pou (Democratic) 68.1%
Robert H. Dixon (Republican) 31.9%

|- ! | Charles Manly Stedman | | Democratic | 1910 | Incumbent re-elected. | nowrap | {{Plainlist|

Charles Manly Stedman (Democratic) 55.9%
John W. Kurfees (Republican) 44.1%

|- ! | Hannibal L. Godwin | | Democratic | 1906 | Incumbent re-elected. | nowrap | {{Plainlist|

Hannibal L. Godwin (Democratic) 72.1%
Alexander L. McCaskill (Republican) 27.9%

|- ! | Leonidas D. Robinson | | Democratic | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

Leonidas D. Robinson (Democratic) 56.4%
James D. Gregg (Republican) 43.6%

|- ! | Robert L. Doughton | | Democratic | 1910 | Incumbent re-elected. | nowrap | {{Plainlist|

Robert L. Doughton (Democratic) 53.8%
Frank A. Linney (Republican) 46.2%

|- ! | Edwin Y. Webb | | Democratic | 1902 | Incumbent re-elected. | nowrap | {{Plainlist|

Edwin Y. Webb (Democratic) 57.0%
Charles A. Jonas (Republican) 43.0%

|- ! | Zebulon Weaver | | Democratic | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

Zebulon Weaver (Democratic) 51.7%
James Jefferson Britt (Republican) 48.3%

North Dakota

|- ! | John M. Baer | | Republican-NPL | 1917 (special) | Incumbent re-elected. | nowrap | {{Plainlist|

John M. Baer (Republican) 55.1%
Fred Bartholomew (Democratic) 44.9%

|- ! | George M. Young | | Republican | 1912 | Incumbent re-elected. | nowrap | {{Plainlist|

George M. Young (Republican) 74.5%
L. N. Torson (Democratic) 25.5%

|- ! | Patrick Norton | | Republican | 1912 | | Incumbent retired. Republican hold. | nowrap | {{Plainlist|

James H. Sinclair (Republican) 68.8%
Halvor Halvorson (Democratic) 31.2%

Ohio

|- ! | Nicholas Longworth | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Nicholas Longworth (Republican) 56.5%
Sidney G. Stricker (Democratic) 43.5%

|- ! | Victor Heintz | | Republican | 1916 | | Incumbent retired. Republican hold. | nowrap | {{Plainlist|

Ambrose E. B. Stephens (Republican) 52.1%
Richard A. Powell (Democratic) 44.8%
Jonathan Gartelman (Socialist) 3.1%

|- ! | Warren Gard | | Democratic | 1912 | Incumbent re-elected. | nowrap | {{Plainlist|

Warren Gard (Democratic) 49.2%
Charles W. Dustin (Republican) 44.2%
Jonathan M. Cahalane (Socialist) 6.6%

|- ! | Benjamin F. Welty | | Democratic | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

Benjamin F. Welty (Democratic) 50.5%
J. Edward Russell (Republican) 49.5%

|- ! | John S. Snook | | Democratic | 1916 | | Incumbent lost re-election. Republican gain. | nowrap | {{Plainlist|

Charles J. Thompson (Republican) 52.6%
John S. Snook (Democratic) 47.4%

|- ! | Charles C. Kearns | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Charles C. Kearns (Republican) 52.8%
A. G. Turnipseed (Democratic) 47.2%

|- ! | Simeon D. Fess | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Simeon D. Fess (Republican) 61.6%
George H. Thorne (Democratic) 37.5%
John A. Rehm (Socialist) 0.9%

|- ! | John A. Key | | Democratic | 1912 | | Incumbent lost re-election. Republican gain. | nowrap | {{Plainlist|

R. Clint Cole (Republican) 52.9%
John A. Key (Democratic) 47.1%

|- ! | Isaac R. Sherwood | | Democratic | 1906 | Incumbent re-elected. | nowrap | {{Plainlist|

Isaac R. Sherwood (Democratic) 55.1%
James M. Ashley (Republican) 40.3%
Solon T. Klotz (Socialist) 4.6%

|- ! | Robert M. Switzer | | Republican | 1910 | | Incumbent lost renomination. Republican hold. | nowrap | {{Plainlist|

Israel M. Foster (Republican)
Unopposed

|- ! | Horatio C. Claypool | | Democratic | 1916 | | Incumbent lost re-election. Republican gain. | nowrap | {{Plainlist|

Edwin D. Ricketts (Republican) 53.5%
Horatio C. Claypool (Democratic) 46.5%

|- ! | Clement Laird Brumbaugh | | Democratic | 1912 | Incumbent re-elected. | nowrap | {{Plainlist|

Clement Laird Brumbaugh (Democratic) 50.5%
John C. Speaks (Republican) 47.8%
Jacob L. Bachman (Socialist) 1.7%

|- ! | Arthur W. Overmyer | | Democratic | 1914 | | Incumbent lost re-election. Republican gain. | nowrap | {{Plainlist|

James T. Begg (Republican) 53.0%
Arthur W. Overmyer (Democratic) 46.1%
William O. McClory (Socialist) 0.9%

|- ! | Ellsworth R. Bathrick | | Democratic | 1916 | | Incumbent died December 23, 1917. Democratic hold. Winner was also elected to finish the current term; see above. | nowrap | {{Plainlist|

Martin L. Davey (Democratic) 50.3%
Charles W. F. Dick (Republican) 46.8%
Cyrus M. Mantell (Socialist) 2.9%

|- ! | George White | | Democratic | 1916 | | Incumbent lost re-election. Republican gain. | nowrap | {{Plainlist|

C. Ellis Moore (Republican) 52.4%
George White (Democratic) 47.6%

|- ! | Roscoe C. McCulloch | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Roscoe C. McCulloch (Republican) 61.3%
Joseph C. Breitenstein (Democratic) 36.4%
Joseph Bower (Socialist) 2.4%

|- ! | William A. Ashbrook | | Democratic | 1906 | Incumbent re-elected. | nowrap | {{Plainlist|

William A. Ashbrook (Democratic) 52.1%
William M. Morgan (Republican) 47.9%

|- ! | David Hollingsworth | | Republican | 1914 | | Incumbent retired. Republican hold. | nowrap | {{Plainlist|

B. Frank Murphy (Republican) 53.0%
William B. Francis (Democratic) 47.0%

|- ! | John G. Cooper | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

John G. Cooper (Republican) 95.6%
Joseph Cooper (Socialist) 4.4%

|- ! | William Gordon | | Democratic | 1912 | | Incumbent lost renomination. Democratic hold. | nowrap | {{Plainlist|

Charles A. Mooney (Democratic) 55.0%
Jerry R. Zmunt (Republican) 38.3%
Charles Emil Ruthenberg (Socialist) 6.8%

|- ! | Robert Crosser | | Democratic | 1912 | | Incumbent lost renomination. Democratic hold. | nowrap | {{Plainlist|

John J. Babka (Democratic) 55.9%
Harry L. Vail (Republican) 37.5%
Tom Clifford (Socialist) 6.6%

|- ! | Henry I. Emerson | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Henry I. Emerson (Republican)
Unopposed

Oklahoma

|- ! | Thomas A. Chandler | | Republican | 1916 | | Incumbent lost re-election. Democratic gain. | nowrap | {{Plainlist|

Everette B. Howard (Democratic) 50.5%
Thomas A. Chandler (Republican) 47.6%
E. E. Sonnanstine (Socialist) 1.8%

|- ! | William W. Hastings | | Democratic | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

William W. Hastings (Democratic) 58.9%
Gus H. Tinch (Republican) 39.0%
J. A. Lewis (Socialist) 2.1%

|- ! | Charles D. Carter | | Democratic | 1907 (new state) | Incumbent re-elected. | nowrap | {{Plainlist|

Charles D. Carter (Democratic) 66.8%
H. J. Fowler (Republican) 29.8%
R. M. Price (Socialist) 3.4%

|- ! | Tom D. McKeown | | Democratic | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

Tom D. McKeown (Democratic) 56.9%
E. R. Waite (Republican) 39.9%
William H. Conley (Socialist) 3.2%

|- ! | Joseph B. Thompson | | Democratic | 1912 | Incumbent re-elected. | nowrap | {{Plainlist|

Joseph B. Thompson (Democratic) 57.4%
B. A. McAleer (Republican) 39.6%
J. Luther Langston (Socialist) 2.9%
Alonzo Turner (Independent) 0.1%

|- ! | Scott Ferris | | Democratic | 1907 (new state) | Incumbent re-elected. | nowrap | {{Plainlist|

Scott Ferris (Democratic) 55.9%
L. A. Holmes (Republican) 39.5%
H. C. Diehl (Socialist) 4.7%

|- ! | James V. McClintic | | Democratic | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

James V. McClintic (Democratic) 59.7%
C. B. Leedy (Republican) 32.2%
Orville E. Enfield (Socialist) 8.1%

|- ! | Dick T. Morgan | | Republican | 1908 | Incumbent re-elected. | nowrap | {{Plainlist|

Dick T. Morgan (Republican) 56.4%
C. H. Hyde (Democratic) 39.1%
H. L. Branham (Socialist) 4.3%
Manuel Herrick (Independent) 0.2%

Oregon

|- ! | Willis C. Hawley | | Republican | 1906 | Incumbent re-elected. | nowrap | {{Plainlist|

Willis C. Hawley (Republican) 89.6%
Harlin Talbert (Socialist) 10.4%

|- ! | Nicholas J. Sinnott | | Republican | 1912 | Incumbent re-elected. | nowrap | {{Plainlist|

Nicholas J. Sinnott (Republican) 61.3%
James Harvey (Democratic) 35.0%
H. Warmholtz (Socialist) 3.7%

|- ! | Clifton N. McArthur | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Clifton N. McArthur (Republican) 48.4%
John S. Smith (Democratic) 32.7%
Walter Lafferty (Ind. National) 15.9%
Harry M. Wicks (Socialist) 3.1%

Pennsylvania

|- ! | William S. Vare | | Republican | 1912 (special) | Incumbent re-elected. | nowrap | {{Plainlist|

William S. Vare (Republican) 76.43%
Paul B. Cassidy (Democratic) 20.91%
John Leonard Silvey (Socialist) 2.20%
Harvey McCort (Prohibition) 0.46%

|- ! | George S. Graham | | Republican | 1912 | Incumbent re-elected. | nowrap | {{Plainlist|

George S. Graham (Republican) 81.51%
John H. Berkley (Democratic) 17.01%}} | Harry Seidman (Socialist) 1.20% | William Denick (Prohibition) 0.28%

|- ! | J. Hampton Moore | | Republican | 1906 | Incumbent re-elected. | nowrap | {{Plainlist|

J. Hampton Moore (Republican) 78.84%
William A. Hayes (Democratic) 19.79%
John Fuchs (Socialist) 1.37%

|- ! | George W. Edmonds | | Republican | 1912 | Incumbent re-elected. | nowrap | {{Plainlist|

George W. Edmonds (Republican) 68.81%
Joseph E. Fabian (Democratic) 28.24%
Jacob H. Root (Socialist) 2.46%
John S. Hay (Prohibition) 0.50%

|- ! | Peter E. Costello | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Peter E. Costello (Republican) 69.61%
Emanuel R. Clinton (Democratic) 30.39%

|- ! | George P. Darrow | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

George P. Darrow (Republican) 72.14%
John K. Laughlin (Democratic) 26.76%
John Fisler (Progressive) 1.09%

|- ! | Thomas S. Butler | | Republican | 1896 | Incumbent re-elected. | nowrap | {{Plainlist|

Thomas S. Butler (Republican) 76.06%
James G. Milbourn (Democratic) 21.34%}} | Luther S. Kauffman (Prohibition) 1.86% | Howard B. Melody (Socialist) 0.72%

|- ! | Henry Winfield Watson | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Henry Winfield Watson (Republican) 63.38%
Harry E. Grim (Democratic) 33.47%}} | Elmer H. Young (Socialist) 1.66% | Theodore Koons (Prohibition) 1.44%

|- ! | William W. Griest | | Republican | 1908 | Incumbent re-elected. | nowrap | {{Plainlist|

William W. Griest (Republican) 77.14%
Austin E. McCollough (Democratic) 20.12%
S. S. Watts (Prohibition) 2.74%

|- ! rowspan=2 | | | Incumbent lost re-election. Democratic gain. | nowrap | {{Plainlist|

Patrick McLane (Democratic) 49.97%
John R. Farr (Republican) 49.11%
Edward Robling (Socialist) 0.92% |- | | Election successfully contested. Incumbent re-seated February 25, 1921. Republican hold. | nowrap | {{Plainlist|
John R. Farr (Republican)
Patrick McLane (Democratic)

|- ! | Thomas W. Templeton | | Republican | 1916 | | Incumbent retired. Democratic gain. | nowrap | {{Plainlist|

John J. Casey (Democratic) 50.06%
Edmund N. Carpenter (Republican) 49.94%

|- ! | Robert D. Heaton | | Republican | 1914 | | Incumbent retired. Republican hold. | nowrap | {{Plainlist|

John Reber (Republican) 57.29%
James J. Moran (Democratic) 41.21%
F. C. Clarke (Socialist) 1.50%

|- ! | Arthur G. Dewalt | | Democratic | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Arthur G. Dewalt (Democratic) 51.88%
J. Wilmer Fisher (Democratic) 40.95%
L. Birch Wilson Jr. (Socialist) 6.29%
E. J. Fithian (Prohibition) 0.89%

|- ! | Louis T. McFadden | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Louis T. McFadden (Republican) 66.02%
A. M. Cornell (Democratic) 28.56%
Edwin P. Young (Prohibition) 4.73%
William Shellenberger (Socialist) 0.69%

|- ! | Edgar R. Kiess | | Republican | 1912 | Incumbent re-elected. | nowrap | {{Plainlist|

Edgar R. Kiess (Republican) 63.81%
Charles E. Spotts (Democratic) 33.24%
P. A. McGowan (Socialist) 2.94%

|- ! | John V. Lesher | | Democratic | 1912 | Incumbent re-elected. | nowrap | {{Plainlist|

John V. Lesher (Democratic) 48.69%
Albert W. Duy (Democratic) 47.57%
W. W. Haffner (Prohibition) 2.26%
J. S. Ray (Socialist) 1.45%

|- ! | Benjamin K. Focht | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Benjamin K. Focht (Republican) 58.98%
Scott S. Lelby (Democratic) 39.93%
George Bingham (Socialist) 1.05%

|- ! | Aaron S. Kreider | | Republican | 1912 | Incumbent re-elected. | nowrap | {{Plainlist|

Aaron S. Kreider (Republican) 86.20%
John A. Sprenkle (Prohibition) 10.02%
John W. Coldren (Socialist) 3.53%

|- ! | John M. Rose | | Republican | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

John M. Rose (Republican) 61.43%
Bernard J. Clark (Democratic) 36.35%
R. G. Seaman (Socialist) 2.21%

|- ! | Andrew R. Brodbeck | | Democratic | 1916 | | Incumbent lost re-election. Republican gain. | nowrap | {{Plainlist|

Edward S. Brooks (Republican) 52.45%
Andrew R. Brodbeck (Democratic) 46.18%
C. William Thompson (Socialist) 1.35%

|- ! | Charles H. Rowland | | Republican | 1914 | | Incumbent retired. Republican hold. | nowrap | {{Plainlist|

Evan J. Jones (Republican) 56.45%
William E. Tobias (Democratic) 39.94%
Harry W. Brown (Prohibition) 3.60%

|- ! | Edward E. Robbins | | Republican | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

Edward E. Robbins (Republican) 61.09%
George H. McWherter (Democratic) 35.26%
Max Cenis (Socialist) 3.66%

|- ! | Bruce F. Sterling | | Democratic | 1916 | | Incumbent lost re-election. Republican gain. | nowrap | {{Plainlist|

Samuel A. Kendall (Republican) 50.11%
Bruce F. Sterling (Democratic) 48.31%
Louis S. Mellinger (Socialist) 1.58%

|- ! | Henry W. Temple | | Republican | 1912 | Incumbent re-elected. | nowrap | {{Plainlist|

Henry W. Temple (Republican) 69.10%
William M. Hartman (Democratic) 27.12%
Walter V. Tyler (Socialist) 3.79%

|- ! | Henry Alden Clark | | Republican | 1916 | | Incumbent retired. Republican hold. | nowrap | {{Plainlist|

Milton W. Shreve (Republican) 50.96%
Charles N. Crosby (Democratic) 40.01%
Ralph W. Tillotson (Socialist) 4.87%
William H. Kerschner (Prohibition) 4.11%

|- ! | Henry J. Steele | | Democratic | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Henry J. Steele (Democratic) 49.42%
Francis A. March Jr. (Republican) 40.71%
Delbert Strader Bachman (Prohibition) 8.47%
John B. Lerch (Socialist) 1.40%

|- ! | Nathan L. Strong | | Republican | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

Nathan L. Strong (Republican) 70.71%
Don C. Corbett (Democratic) 27.16%
Frank H. Brantlinger (Socialist) 2.12%

|- ! | Earl H. Beshlin | | Democratic | 1917 (special) | | Incumbent lost re-election. Republican gain. | nowrap | {{Plainlist|

Willis J. Hulings (Republican) 54.99%
Earl H. Beshlin (Democratic) 42.38%
M. V. Ball (Socialist) 2.60%

|- ! | Stephen G. Porter | | Republican | 1910 | Incumbent re-elected. | nowrap | {{Plainlist|

Stephen G. Porter (Republican) 88.97%
C. G. Porter (Prohibition) 5.71%
Henry Peter (Socialist) 5.32%

|- ! | M. Clyde Kelly | | Progressive | 1916 | | Incumbent re-elected as a Republican. Republican gain. | nowrap | {{Plainlist|

M. Clyde Kelly (Republican) 90.50%
H. J. Lohr (Socialist) 9.50%

|- ! | John M. Morin | | Republican | 1912 | Incumbent re-elected. | nowrap | {{Plainlist|

John M. Morin (Republican) 91.35%
William A. Prosser (Socialist) 5.01%
F. C. Brittain (Prohibition) 3.63%

|- ! | Guy E. Campbell | | Democratic | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

Guy E. Campbell (Democratic) 87.23%
John W. Slayton (Socialist) 6.59%
William C. Wallace (Prohibition) 6.18%

William J. Burke (Republican) 16.05%
Mahlon M. Garland (Republican) 15.55%
Thomas S. Crago (Republican) 15.51%
Anderson H. Walters (Republican) 15.44%
Joseph F. Gorman (Democratic) 8.13%
J. Calvin Strayer (Democratic) 7.89%
Samuel R. Tarner (Democratic) 7.78%
Fred Ikeler (Democratic) 7.76%}} | O. D. Brubaker (Prohibition) 0.86% | Elisha Kent Kane (Prohibition) 0.78% | Albert Gaddis (Prohibition) 0.74% | E. L. McKee (Prohibition) 0.70% | Cora M. Bixker (Socialist) 0.68% | Henry W. Schlegel (Socialist) 0.64% | John C. Euler (Socialist) 0.63% | Harry T. Vaughn (Socialist) 0.62% | John W. Dix (Single Tax) 0.07% | Lewis Ryan (Single Tax) 0.06% | Oliver McKnight (Single Tax) 0.06% | Calvin B. Power (Single Tax) 0.05%

Rhode Island

|- ! | George F. O'Shaunessy | | Democratic | 1910 | | Incumbent retired to run for U.S. Senator. Republican gain. | nowrap | {{Plainlist|

Clark Burdick (Republican) 54.3%
Theodore F. Green (Democratic) 43.4%
Joseph M. Coldwell (Socialist) 2.3%

|- ! | Walter R. Stiness | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Walter R. Stiness (Republican) 56.0%
Stephen J. Casey (Democratic) 41.6%
Washington I. Bucklin (Socialist) 2.4%

|- ! | Ambrose Kennedy | | Republican | 1912 | Incumbent re-elected. | nowrap | {{Plainlist|

Ambrose Kennedy (Republican) 52.6%
William G. Troy (Democratic) 45.6%
Edward W. Thienert (Socialist) 1.9%

South Carolina

Main article: 1918 United States House of Representatives elections in South Carolina

|- ! | Richard S. Whaley | | Democratic | 1913 (special) | Incumbent re-elected. | nowrap | {{Plainlist|

Richard S. Whaley (Democratic)
Unopposed

|- ! | James F. Byrnes | | Democratic | 1910 | Incumbent re-elected. | nowrap | {{Plainlist|

James F. Byrnes (Democratic)
Unopposed

|- ! | Frederick H. Dominick | | Democratic | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

Frederick H. Dominick (Democratic)
Unopposed

|- ! | Samuel J. Nicholls | | Democratic | 1915 (special) | Incumbent re-elected. | nowrap | {{Plainlist|

Samuel J. Nicholls (Democratic)
Unopposed

|- ! | William F. Stevenson | | Democratic | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

William F. Stevenson (Democratic)
Unopposed

|- ! | J. Willard Ragsdale | | Democratic | 1912 | Incumbent re-elected. | nowrap | {{Plainlist|

J. Willard Ragsdale (Democratic)
Unopposed

|- ! | A. Frank Lever | | Democratic | 1901 (special) | Incumbent re-elected. | nowrap | {{Plainlist|

A. Frank Lever (Democratic) 96.4%
R. H. Richardson (Unknown) 3.6%

South Dakota

|- ! | Charles H. Dillon | | Republican | 1912 | | Incumbent lost renomination. Republican hold. | nowrap | {{Plainlist|

Charles A. Christopherson (Republican) 54.1%
Robert E. Dowdell (Democratic) 41.5%
J. D. Wipf (Independent) 3.4%
C. F. Carlson (Independent) 0.9%

|- ! | Royal C. Johnson | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Royal C. Johnson (Republican) 72.1%
James W. McCarter (Democratic) 27.9%

|- ! | Harry Gandy | | Democratic | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Harry Gandy (Democratic) 50.7%
Harry A. Atwater (Republican) 36.4%
Harry A. Ayres (Independent) 11.8%
J. E. Basford (Socialist) 1.2%

Tennessee

|- ! | Sam R. Sells | | Republican | 1910 | Incumbent re-elected. | nowrap | {{Plainlist|

Sam R. Sells (Republican)
Unopposed

|- ! | Richard W. Austin | | Republican | 1908 | | Incumbent lost renomination. Republican hold. | nowrap | {{Plainlist|

J. Will Taylor (Republican) 74.0%
H. Johnson (Democratic) 26.0%

|- ! | John A. Moon | | Democratic | 1896 | Incumbent re-elected. | nowrap | {{Plainlist|

John A. Moon (Democratic)
Unopposed

|- ! | Cordell Hull | | Democratic | 1906 | Incumbent re-elected. | nowrap | {{Plainlist|

Cordell Hull (Democratic)
Unopposed

|- ! | William C. Houston | | Democratic | 1904 | | Incumbent retired. Democratic hold. | nowrap | {{Plainlist|

Ewin L. Davis (Democratic)
Unopposed

|- ! | Jo Byrns | | Democratic | 1908 | Incumbent re-elected. | nowrap | {{Plainlist|

Jo Byrns (Democratic)
Unopposed

|- ! | Lemuel P. Padgett | | Democratic | 1900 | Incumbent re-elected. | nowrap | {{Plainlist|

Lemuel P. Padgett (Democratic)
Unopposed

|- ! | Thetus W. Sims | | Democratic | 1896 | Incumbent re-elected. | nowrap | {{Plainlist|

Thetus W. Sims (Democratic)
Unopposed

|- ! | Finis J. Garrett | | Democratic | 1904 | Incumbent re-elected. | nowrap | {{Plainlist|

Finis J. Garrett (Democratic)
Unopposed

|- ! | Hubert Fisher | | Democratic | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

Hubert Fisher (Democratic)
Unopposed

Texas

|- ! | Eugene Black | | Democratic | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Eugene Black (Democratic)
Unopposed

|- ! | Martin Dies Sr. | | Democratic | 1908 | | Incumbent retired. Democratic hold. | nowrap | {{Plainlist|

John C. Box (Democratic)
Unopposed

|- ! | James Young | | Democratic | 1910 | Incumbent re-elected. | nowrap | {{Plainlist|

James Young (Democratic)
Unopposed

|- ! | Sam Rayburn | | Democratic | 1912 | Incumbent re-elected. | nowrap | {{Plainlist|

Sam Rayburn (Democratic)
Unopposed

|- ! | Hatton W. Sumners | | Democratic | 1912 | Incumbent re-elected. | nowrap | {{Plainlist|

Hatton W. Sumners (Democratic)
Unopposed

|- ! | Rufus Hardy | | Democratic | 1906 | Incumbent re-elected. | nowrap | {{Plainlist|

Rufus Hardy (Democratic) 87.8%
Charles W. Beck (Republican) 12.2%

|- ! | Alexander W. Gregg | | Democratic | 1902 | | Incumbent retired. Democratic hold. | nowrap | {{Plainlist|

Clay Stone Briggs (Democratic)
Unopposed

Joe H. Eagle (Democratic) 96.2%
M. H. Broyles (Unknown) 3.8%

|- ! | Joseph J. Mansfield | | Democratic | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

Joseph J. Mansfield (Democratic)
Unopposed

|- ! | James P. Buchanan | | Democratic | 1913 (Special) | Incumbent re-elected. | nowrap | {{Plainlist|

James P. Buchanan (Democratic)
Unopposed

|- ! | Tom Connally | | Democratic | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

Tom Connally (Democratic)
Unopposed

|- ! | James Clifton Wilson | | Democratic | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

James Clifton Wilson (Democratic)
Unopposed

|- ! | | New seat. Democratic gain. | nowrap | {{Plainlist|

Lucian W. Parrish (Democratic)
Unopposed

|- ! | James L. Slayden | | Democratic | 1896 | | Incumbent retired. Democratic hold. | nowrap | {{Plainlist|

Carlos Bee (Democratic) 68.4%
John D. Hartman (Republican) 31.6%

|- ! | John Nance Garner | | Democratic | 1902 | Incumbent re-elected. | nowrap | {{Plainlist|

John Nance Garner (Democratic)
Unopposed

|- ! | | New seat. Democratic gain. | nowrap | {{Plainlist|

Claude B. Hudspeth (Democratic)
Unopposed

|- ! | Thomas L. Blanton Redistricted from the | | Democratic | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

Thomas L. Blanton (Democratic)
Unopposed

|- ! | John Marvin Jones Redistricted from the | | Democratic | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

John Marvin Jones (Democratic) 95.3%
Hugh E. Exum (Republican) 4.7%

Utah

|- ! | Milton H. Welling | | Democratic | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

Milton H. Welling (Democratic) 54.9%
William Henry Wattis (Republican) 44.4%
Daniel N. Keef (Socialist) 0.8%

|- ! | James Henry Mays | | Democratic | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

James Henry Mays (Democratic) 58.7%
William Spry (Republican) 39.6%
A. H. Kempton (Socialist) 1.8%

Vermont

|- ! | Frank L. Greene | | Republican | 1912 (special) | Incumbent re-elected. | nowrap | {{Plainlist|

Frank L. Greene (Republican) 75.8%
John Higgins (Democratic) 24.1%

|- ! | Porter H. Dale | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Porter H. Dale (Republican) 74.5%
John B. Reardon (Democratic) 25.5%

Virginia

|- ! | S. Otis Bland | | Democratic | 1918 (special) | Incumbent re-elected. | nowrap | {{Plainlist|

S. Otis Bland (Democratic) 99.9%

|- ! | Edward E. Holland | | Democratic | 1910 | Incumbent re-elected. | nowrap | {{Plainlist|

Edward E. Holland (Democratic)
Unopposed

|- ! | Andrew Jackson Montague | | Democratic | 1912 | Incumbent re-elected. | nowrap | {{Plainlist|

Andrew Jackson Montague (Democratic)
Unopposed

|- ! | Walter A. Watson | | Democratic | 1912 | Incumbent re-elected. | nowrap | {{Plainlist|

Walter A. Watson (Democratic) 99.9%

|- ! | Edward W. Saunders | | Democratic | 1906 | Incumbent re-elected. | nowrap | {{Plainlist|

Edward W. Saunders (Democratic) 99.97%

|- ! | Carter Glass | | Democratic | 1902 (special) | Incumbent re-elected. | nowrap | {{Plainlist|

Carter Glass (Democratic) 99.6%

|- ! | Thomas W. Harrison | | Democratic | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

Thomas W. Harrison (Democratic) 88.8%
John Paul (Republican) 11.0%

|- ! | Charles C. Carlin | | Democratic | 1907 (special) | Incumbent re-elected. | nowrap | {{Plainlist|

Charles C. Carlin (Democratic) 99.98%

|- ! | C. Bascom Slemp | | Republican | 1907 (special) | Incumbent re-elected. | nowrap | {{Plainlist|

C. Bascom Slemp (Republican) 95.0%
D. B. Dale (Democratic) 4.9%

|- ! | Henry D. Flood | | Democratic | 1900 | Incumbent re-elected. | nowrap | {{Plainlist|

Henry D. Flood (Democratic) 99.7%

Washington

|- ! | John Franklin Miller | | Republican | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

John Franklin Miller (Republican) 50.55%
J. M. Hawthorne (Democratic) 44.40%
Hulet M. Wells (Socialist) 5.06%

|- ! | Lindley H. Hadley | | Republican | 1914 | Incumbent re-elected. | nowrap | {{Plainlist|

Lindley H. Hadley (Republican) 53.65%
Joseph A. Sloan (Democratic) 40.81%
James M. Salter (Socialist) 5.54%

|- ! | Albert Johnson | | Republican | 1912 | Incumbent re-elected. | nowrap | {{Plainlist|

Albert Johnson (Republican) 66.57%
Theodore Hoss (Democratic) 28.31%
O. T. Clark (Socialist) 5.12%

|- ! | William La Follette | | Republican | 1910 | | Incumbent lost renomination. Republican hold. | nowrap | {{Plainlist|

John W. Summers (Republican) 55.26%
William E. McCroskey (Democratic) 42.25%
Walter Price (Socialist) 2.46%

|- ! | Clarence Dill | | Democratic | 1914 | | Incumbent lost re-election. Republican gain. | nowrap | {{Plainlist|

J. Stanley Webster (Republican) 52.20%
Clarence Dill (Democratic) 46.70%
Peter Harrison (Socialist) 1.10%

West Virginia

|- ! | Matthew M. Neely | | Democratic | 1913 (special) | Incumbent re-elected. | nowrap | {{Plainlist|

Matthew M. Neely (Democratic) 52.8%
Charles J. Schuck (Republican) 46.4%
E. B. Hibbs (Socialist) 0.8%

|- ! | George M. Bowers | | Republican | 1916 (special) | Incumbent re-elected. | nowrap | {{Plainlist|

George M. Bowers (Republican) 52.7%
Ben H. Hiner (Democratic) 46.0%
E. E. Smith (Socialist) 1.3%

|- ! | Stuart F. Reed | | Republican | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

Stuart F. Reed (Republican) 53.9%
Ernest Randolph (Democratic) 45.1%
P. R. Garrett (Socialist) 0.9%

|- ! | Harry C. Woodyard | | Republican | 1916 (special) | Incumbent re-elected. | nowrap | {{Plainlist|

Harry C. Woodyard (Republican) 55.3%
Stuart H. Bowman (Democratic) 44.3%
G. W. Gillispie (Socialist) 0.4%

|- ! | Edward Cooper | | Republican | 1914 | | Incumbent lost renomination. Republican hold. | nowrap | {{Plainlist|

Wells Goodykoontz (Republican) 54.1%
W. H. McNeal (Democratic) 45.9%

|- ! | Adam B. Littlepage | | Democratic | 1914 | | Incumbent lost re-election. Republican gain. | nowrap | {{Plainlist|

Leonard S. Echols (Republican) 51.5%
Adam B. Littlepage (Democratic) 46.8%
P. H. Camp (Socialist) 1.7%

Wisconsin

|- ! | Henry Allen Cooper | | Republican | 1892 | | Incumbent lost re-election as an Independent. Republican hold. | nowrap | {{Plainlist|

Clifford E. Randall (Republican) 42.3%
Henry Allen Cooper (Independent) 28.9%
Calvin Stewart (Democratic) 24.8%
Samuel S. Walkup (Socialist) 4.0%

|- ! | Edward Voigt | | Republican | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

Edward Voigt (Republican) 44.0%
John Clifford (Democratic) 36.0%
Oscar Ameringer (Socialist) 20.0%

|- ! | John M. Nelson | | Republican | 1906 (special) | | Incumbent lost renomination. Republican hold. | nowrap | {{Plainlist|

James G. Monahan (Republican) 73.4%
Ernest N. Warner (Independent) 17.5%
Edward J. Reynolds (Ind. Democratic) 8.9%

|- ! | William J. Cary | | Republican | 1906 | | Incumbent lost renomination. Republican hold. | nowrap | {{Plainlist|

John C. Kleczka (Republican) 58.1%
Edmund Melms (Socialist) 41.8%

|- ! | William H. Stafford | | Republican | 1912 | | Incumbent lost re-election. Socialist gain. | nowrap | {{Plainlist|

Victor L. Berger (Socialist) 43.7%
Joseph P. Carney (Democratic) 30.3%
William H. Stafford (Republican) 26.0%

|- ! | James H. Davidson | | Republican | 1916 | | Incumbent died August 6, 1918 Republican hold. | nowrap | {{Plainlist|

Florian Lampert (Republican) 41.5%
Bondeul A. Husting (Democratic) 35.4%
G. H. Thompson (Socialist) 22.0%
Byron E. Van Keuren (Prohibition) 1.0%

|- ! | John J. Esch | | Republican | 1898 | Incumbent re-elected. | nowrap | {{Plainlist|

John J. Esch (Republican) 70.9%
Arthur A. Bentley (Democratic) 26.8%
Oliver Needham (Prohibition) 2.2%

|- ! | Edward E. Browne | | Republican | 1912 | Incumbent re-elected. | nowrap | {{Plainlist|

Edward E. Browne (Republican) 51.8%
John W. Brown (Democratic) 25.9%
Leo Krzycki (Socialist) 22.3%

|- ! | David G. Classon | | Republican | 1916 | Incumbent re-elected. | nowrap | {{Plainlist|

David G. Classon (Republican) 60.4%
A. R. McDonald (Democratic) 39.5%

|- ! | James A. Frear | | Republican | 1912 | Incumbent re-elected. | nowrap | {{Plainlist|

James A. Frear (Republican) 90.2%
William H. Frawley (Independent) 9.7%

|- ! | Irvine Lenroot | | Republican | 1908 | | Incumbent resigned when elected U.S. Senator. Republican hold. | nowrap | {{Plainlist|

Adolphus Peter Nelson (Republican) 84.3%
John P. Jensen (Socialist) 15.3%

Wyoming

|- ! | Frank W. Mondell | | Republican | 1898 | Incumbent re-elected. | nowrap | {{Plainlist|

Frank W. Mondell (Republican) 64.2%
Hayden M. White (Democratic) 35.8%

Non-voting delegates

Alaska Territory

District	Incumbent	This race	Representative
James Wickersham		Republican	1908
1916 (lost)
1919 (won contest)		Incumbent lost re-election.
Democratic gain.	nowrap	{{Plainlist

As he had successfully done the previous time, Wickersham again contested the election. During the contest, Sulzer died April 28, 1919, and Democrat George Barnes Grigsby won the June 5 special election to finish the term. Wickersham then won the election contest and was seated March 1, 1921.

Notes

References

Bibliography

References

Murphy, Paul. (1974). "Political Parties In American History, Volume 3, 1890-present". [[G. P. Putnam's Sons]].
"MO District 10 - Special Election Race - Nov 05, 1918".
House general elections, All States, 1918 summary. (2023). ''CQ voting and elections collection (web site).'' http://library.cqpress.com/elections/avg1918-3us1
"State of Colorado Elections Database » Search Past Election Results".
Campbell, T.. (2005). "Deliver the Vote: A History of Election Fraud, an American Political Tradition, 1742-2004". Carroll & Graf.
"Wisconsin U.S. House Election Results". Humphrey Institute of Public Affairs.
"AK Territorial Delegate - Recount Race - Jan 07, 1919".
"AK Territorial Delegate Race - Nov 05, 1918".

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