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California's 45th congressional district

U.S. House district for California

U.S. House district for California

FieldValue
stateCalifornia
district number45
image name{{switcher
{{maplinkframeyesplain=yesfrom=California's 45th congressional district (2023–).mapframe-height=300frame-width=400frame-latitude=33.81frame-longitude=-117.96zoom=10overlay-horizontal-alignment=rightoverlay-vertical-alignment=bottomoverlay=[[File:California's 45th congressional district (since 2023).svg100px]]}}
{{maplinkframeyesplain=yesfrom=California's 45th congressional district (2027–).mapframe-height=300frame-width=400frame-latitude=33.81frame-longitude=-117.96zoom=10overlay-horizontal-alignment=rightoverlay-vertical-alignment=bottomoverlay=[[File:California's 45th congressional district (since 2027).svg100px]]}}
image captionInteractive map of district boundaries
representativeDerek Tran
partyDemocratic
residenceOrange
population741,928
population year2024
median income$105,531
percent white25.2
percent hispanic30.0
percent black2.1
percent asian38.4
percent more than one race3.3
percent other race0.9
cpviD+1

| |From 2023 to 2027, starting with the 2022 elections | |From 2027, starting with the 2026 elections | percent more than one race = 3.3 California's 45th congressional district is a congressional district in the U.S. state of California currently represented by Democrat Derek Tran.

The 45th district was created as a result of the redistricting cycle after the 1980 census.

The district is based in Orange and Los Angeles counties and includes all of Garden Grove, Westminster, Cerritos, Buena Park, Placentia, Hawaiian Gardens, Cypress, Fountain Valley, Artesia, Los Alamitos, Rossmoor, and La Palma, as well as parts of Brea, Lakewood, and Fullerton.

In 2018, incumbent Representative Mimi Walters competed against a field of four Democrats and an independent candidate in the primary election for the 2018 midterm elections. On February 25, 2018, UC Irvine (UCI) assistant law professor Dave Min received the endorsement of the California Democratic Party.

Min, former White House senior technology advisor Brian Forde, former legislative assistant to Sherrod Brown (D-OH) Kia Hamadanchy, UCI law professor Katie Porter, and UCI business professor John Graham ran in the "top two" primary in June 2018. Walters and Porter placed first and second and advanced to the general election in November.

On November 14, 2018, eight days after polls closed, Dave Wasserman, then the House Editor for The Cook Political Report, projected that Porter had won the general election.

In 2024, the election in this district was one of the state's most competitive. In its current form after the 2020 redistricting, the district has a significant presence of Asian-American voters.

Recent election results from statewide races

2023–2027 boundaries

--

YearOfficeResults
2008PresidentMcCain 52% - 48%
2010GovernorWhitman 54% - 40%
Lt. GovernorMaldonado 47% - 38%
Secretary of StateDunn 50% - 41%
Attorney GeneralCooley 59% - 32%
TreasurerWalters 48% - 44%
ControllerStrickland 50% - 41%
2012PresidentRomney 49.1% - 48.7%
2014GovernorKashkari 53% - 47%
2016PresidentClinton 54% - 41%
2018GovernorNewsom 50.4% - 49.6%
Attorney GeneralBecerra 52% - 48%
2020PresidentBiden 52% - 46%
2022Senate (Reg.)Meuser 51% - 49%
GovernorDahle 51% - 49%
Lt. GovernorUnderwood Jacobs 51% - 49%
Secretary of StateBernosky 51% - 49%
Attorney GeneralHochman 52% - 48%
TreasurerGuerrero 53% - 47%
ControllerChen 54% - 46%
2024PresidentHarris 49% - 48%
Senate (Reg.)Garvey 50.5% - 49.5%

2027–2033 boundaries

YearOfficeResults
2008PresidentObama 57% - 43%
2010GovernorBrown 55% - 37%
Lt. GovernorNewsom 54% - 32%
Secretary of StateBowen 53% - 37%
Attorney GeneralHarris 58% - 30%
TreasurerLockyer 51% - 40%
ControllerChiang 47% - 41%
2012PresidentObama 59% - 41%
2014GovernorBrown 58% - 42%
2016PresidentClinton 57% - 36%
2018GovernorNewsom 63% - 37%
Attorney GeneralBecerra 61% - 39%
2020PresidentBiden 58% - 39%
2022Senate (Reg.)Padilla 64% - 36%
GovernorNewsom 67% - 33%
Lt. GovernorKounalakis 65% - 35%
Secretary of StateWeber 64% - 36%
Attorney GeneralRob Bonta 65% - 35%
TreasurerMa 65% - 35%
ControllerCohen 66% - 34%
2024PresidentHarris 61% - 36%
Senate (Reg.)Schiff 64% - 36%

--

Composition

FIPS County CodeCountySeatPopulation
37Los AngelesLos Angeles9,663,345
59OrangeSanta Ana3,135,755

Under the 2020 redistricting, California's 45th congressional district is located in Southern California, taking up western Orange County and east Los Angeles County. The area in Orange County includes the cities of Cypress, Brea, Placentia, Westminster, Garden Grove, Buena Park, Fountain Valley, Los Alamitos, La Palma, and northern Fullerton, part of Yorba Linda; and the census-designated places Rossmoor and Midway City. The area in Los Angeles County includes the cities of Cerritos, Artesia, Hawaiian Gardens, and part of Lakewood.

Orange County is split between this district, the 40th district, the 46th district, and the 47th district. The 45th and 40th are partitioned by Orange Freeway, E Lambert Rd, Sunrise Rd, Foothill Ln, Wandering Ln, N Associated Rd, E Birch St, S Valencia Ave, La Plaza Dr, La Floresta Dr, La Crescenta Dr, Highway 90, 1053 E Imperial Highway-343 Tolbert St, Vesuvius Dr, Rose Dr, Wabash Ave, 6th St, Golden Ave, Carbon Canyon Creek, E Yorba Linda Blvd, Jefferson St, 1401 Zion Ave-N Van Buren St, Buena Vista Ave, 17225 Orange Blossom Ln-1480 E Howard Pl, 17511 Pine Cir-Orchard Dr, Mariposa Ave, Lakeview Ave, E Miraloma Ave, Fee-Ana St, Sierra Madre Cir, E Orangethorpe Ave, Burlington Northern Santa Fe Railroad, Kensington Ave, N Kraemer Blvd, Carbon Creek, and E La Jolla St.

The 45th and 46th are partitioned by Santa Ana River, W Lehnhardt Ave, Gloxinia Ave, Lilac Way, Edinger Ave, Pebble Ct, 10744 W Lehnhardt Ave-10726 Kedge Ave, 724 S Sail St-5641 W Barbette Ave-407 S Starboard St, Starboard St/S Cooper St, Taft St, Hazard Ave, N Euclid St, Westminster Ave, Clinton St, 14300 Clinton St-1001 Mar Les Dr, Mar Les Dr, 2729 Huckleberry Rd, N Fairview St, Fairview St, 13462 Garden Grove Blvd-13252 Marty Ln, Townley St/Siemon Ave, W Garden Grove Blvd, S Lewis St, W Chapman Ave, E Simmons Ave, S Haster St, Ascot Dr, W Orangewood Ave, S 9th St, 2209 S Waverly Dr-11751 S Waverly Dr, Euclid St, Haven Ln, W Dudley Ave, S Euclid St, Katella Ave, Dale St, Rancho Alamitos High School, Orangewood Ave, Barber City Channel, Arrowhead St, Del Rey Dr, Westcliff Dr, Lampson Ave, Fern St, Garden Glove Blvd, Union Pacific Railroad, 7772 W Chapman Ave-Bently Ave, Highway 39, Western Ave, Stanton Storm Channel, Knott Ave, 6970 Via Kannela-6555 Katella Ave, Cerritos Ave, 10490 Carlotta Ave-Ball Rd, John Beat Park, S Knott Ave, Solano Dr, Monterra Way, Campesina Dr, Holder Elementary School, W Orange Ave, 6698 Via Riverside Way-Orangeview Junior High School, W Lincoln Ave, 195 N Western Ave-298 N Western Ave, 3181 W Coolidge Ave-405 N Dale St, W Crescent Ave, N La Reina St, W La Palma Ave, Boisseranc Park, I-5 HOV Lane, Orangethorpe Ave, Fullerton Creek, Whitaker St, Commonwealth Ave, Los Angeles County Metro, W Malvern Ave, W Chapman Ave, E Chapman Ave, S Placentia Ave, Kimberly Ave, E Orangethorpe Ave, and 2500 E Terrace St-Highway 57.

The 45th and 47th are partitioned by Highway 405, Old Ranch Parkway, Seal Beach Blvd, St Cloud Dr, Montecito Rd, Rossmoor Center Way, 12240 Seal Beach Blvd-Los Alamitos Army Airfield, Bolsa Chica Channel, Rancho Rd, Harold Pl, Springdale St, 6021 Anacapa Dr-Willow Ln, Edward St, Bolsa Ave, Goldenwest St, McFadden Ave, Union Pacific Railroad, 15241 Cascade Ln-15241 Cedarwood Ave, Highway 39, Edinger Ave, Newland St, Heil Ave, Magnolia St, Warner Ave, Garfield Ave, and the Santa Ana River.

Los Angeles County is split between this district, the 38th district, and the 42nd district. The 45th and 42nd are partitioned by San Gabriel River, Palo Verde Ave, South St, Del Amo Blvd, Pioneer Blvd, Coyote Creek, Centralia Creek, Hawaiian Ave, Verne Ave, Bloomfield Park, Highway 605, 226th St, Dorado Cir, Cortner Ave, E Woodson St, Bloomfield Ave, Lilly Ave, Marna Ave, and Los Alamos Channel.

The 45th and 38th are partitioned by Valley View Ave, Southern Pacific Railroad, Alondra Blvd, 15917 Canyon Creek Rd-12371 Hermosura St, Norwalk Blvd, 166th St, and Cerritos College Child Development-Alondra Blvd.

Cities and CDPs with 10,000 or more people

  • Garden Grove – 171,949
  • Fullerton – 143,617
  • Westminster – 90,911
  • Buena Park – 84,034
  • Lakewood – 82,496
  • Yorba Linda – 68,336
  • Fountain Valley – 57,047
  • Placentia – 51,824
  • Cypress – 50,151
  • Cerritos – 49,578
  • Brea – 47,325
  • Artesia – 16,395
  • La Palma – 15,581
  • Hawaiian Gardens – 13,593
  • Los Alamitos – 11,780
  • Rossmoor – 10,625

2,500 – 10,000 people

  • Midway City – 8,825

List of members representing the district

MemberPartyDatesCong
ress(es)Electoral historyCounties
District created January 3, 1983
[[File:Duncan Hunter, official photo portrait, color.jpg100px]]
Duncan Hunter
(Coronado){{cite webtitle=Biographical Directory of the United States Congress 1774–2005website=govinfo.govaccess-date=19 February 2024}}RepublicannowrapJanuary 3, 1983 –
January 3, 1993Redistricted from the and re-elected in 1982.
Re-elected in 1984.
Re-elected in 1986.
Re-elected in 1988.
Re-elected in 1990.
Redistricted to the .
[[File:Danarohrabacher105th.jpg100px]]
Dana Rohrabacher
(Huntington Beach)RepublicannowrapJanuary 3, 1993 –
January 3, 2003Redistricted from the and re-elected in 1992.
Re-elected in 1994.
Re-elected in 1996.
Re-elected in 1998.
Re-elected in 2000.
Redistricted to the .1993–2003
Orange
[[File:Mary Bono Mack, official portrait, 112th Congress.jpg100px]]
Mary Bono
(Palm Springs)RepublicannowrapJanuary 3, 2003 –
January 3, 2013Redistricted from the and re-elected in 2002.
Re-elected in 2004.
Re-elected in 2006.
Re-elected in 2008.
Re-elected in 2010.
Redistricted to the and lost re-election.2003–2013
[[File:CA-45th.png300px]]
Riverside
[[File:John Campbell (congressman), official photo portrait, color.jpg100px]]
John Campbell
(Irvine)RepublicannowrapJanuary 3, 2013 –
January 3, 2015Redistricted from the and re-elected in 2012.
Retired.2013–2023
[[File:California US Congressional District 45 (since 2013).tif300px]]
Orange
[[File: Mimi Walters, Official Portrait, 114th Congress (cropped 2).jpg100px]]
Mimi Walters
(Irvine)RepublicannowrapJanuary 3, 2015 –
January 3, 2019Elected in 2014.
Re-elected in 2016.
Lost re-election.
[[File:Katie Porter, official portrait, 116th Congress.jpg100px]]
Katie Porter
(Irvine).DemocraticnowrapJanuary 3, 2019 –
January 3, 2023Elected in 2018.
Re-elected in 2020.
Redistricted to the .
[[File:MichelleSteel.jpg100px]]
Michelle Steel
(Seal Beach)RepublicannowrapJanuary 3, 2023 –
January 3, 2025Redistricted from the and re-elected in 2022.
Lost re-election.2023–present:
[[File:California's 45th congressional district (since 2023) (new version).svg300px]]
Orange, Los Angeles
[[File:Rep. Derek Tran Official Portrait.jpg100px]]
Derek Tran
(Orange)DemocraticnowrapJanuary 3, 2025–
presentElected in 2024.

Election results

1982

1984

1986

1988

1990

1992

1994

1996

1998

2000

2002

2004

2006

2008

2010

2012

2014

2016

2018

2020

2022

2024

Historical district boundaries

2003-13

From 2003 to 2013, this district was based in Riverside County. The district included the communities of Palm Springs, Moreno Valley, Palm Desert, Hemet, Cathedral City, Temecula, Blythe, Rancho Mirage, Murrieta, Indio, Indian Wells, La Quinta, Cabazon, Anza, Thermal, Idyllwild, Coachella, and other unincorporated areas of Riverside County.

2013-23

References

References

  1. Center for New Media & Promotion (CNMP), US Census Bureau. "My Congressional District".
  2. "2025 Cook PVI℠: District Map and List (119th Congress)".
  3. Hagen, Lisa. (February 25, 2018). "California Dems endorse three candidates in pivotal House races".
  4. Mai-Duc, Christine. (July 19, 2017). "Former Obama advisor jumps in to challenge Rep. Mimi Walters in Orange County". Los Angeles Times.
  5. "A third challenger announces bid for Rep. Mimi Walters' Orange County seat". LA Times.
  6. (May 21, 2017). "Democratic Hopefuls Look to Unseat Republicans in 2018".
  7. Wasserman, Dave. (November 14, 2018). "Projection: Katie Porter (D) has defeated Rep. Mimi Walters (R) in #CA45.".
  8. Tensley, Brandon. (2022-11-03). "Battle over House seat in California is a wake-up call about the importance of Asian American voters".
  9. "CA 2022 Congressional".
  10. https://substack.com/@drewsavicki/p-47092588 {{Bare URL inline. (July 2025)
  11. (8 November 2022). "Supplement to Statement of Vote".
  12. (5 November 2024). "Supplement to Statement of Vote".
  13. "CA 2026 Congressional".
  14. "California FIPS Codes". National Weather Service.
  15. (2016-07-08). "Ex-Congressman John Campbell asks $6.7 million for Irvine house with 'Bat-cave' garage".
  16. [https://clerk.house.gov/member_info/electionInfo/2016/115-nominations.pdf Nominations] clerk.house.gov
  17. [https://clerk.house.gov/member_info/electionInfo/2020/117-nominations.pdf Nominations] clerk.house.gov
  18. (2024-12-18). "Rep. Michelle Steel gives farewell address from the House floor". Orange County Register.
  19. [http://clerk.house.gov/member_info/electionInfo/1982election.pdf 1982 election results]
  20. [http://clerk.house.gov/member_info/electionInfo/1984election.pdf 1984 election results]
  21. [http://clerk.house.gov/member_info/electionInfo/1986election.pdf 1986 election results]
  22. [http://clerk.house.gov/member_info/electionInfo/1988election.pdf 1988 election results]
  23. [http://clerk.house.gov/member_info/electionInfo/1990election.pdf 1990 election results]
  24. [http://clerk.house.gov/member_info/electionInfo/1992election.pdf 1992 election results]
  25. [http://clerk.house.gov/member_info/electionInfo/1994election.pdf 1994 election results]
  26. [http://clerk.house.gov/member_info/electionInfo/1996election.pdf 1996 election results]
  27. [http://clerk.house.gov/member_info/electionInfo/1998election.pdf 1998 election results]
  28. [http://clerk.house.gov/member_info/electionInfo/2000election.pdf 2000 election results]
  29. [https://elections.cdn.sos.ca.gov/sov/2002-general/congress.pdf 2002 election results]
  30. [https://elections.cdn.sos.ca.gov/sov/2004-general/us-reps-all-formatted.pdf 2004 election results]
  31. [https://elections.cdn.sos.ca.gov/sov/2006-general/congress.pdf 2006 election results]
  32. [https://elections.cdn.sos.ca.gov/sov/2008-general/23_34_us_reps.pdf 2008 election results]
  33. [https://elections.cdn.sos.ca.gov/sov/2010-general/58-united-states-representative.pdf 2010 election results]
  34. [https://elections.cdn.sos.ca.gov/sov/2012-general/12-us-reps.pdf 2012 election results]
  35. [https://elections.cdn.sos.ca.gov/sov/2014-general/pdf/43-congress.pdf 2014 election results]
  36. [https://elections.cdn.sos.ca.gov/sov/2016-general/sov/26-us-reps-formatted.pdf 2016 election results]
  37. [https://elections.cdn.sos.ca.gov/sov/2018-general/sov/48-congress.pdf 2018 election results]
  38. [https://elections.cdn.sos.ca.gov/sov/2020-general/sov/24-us-reps.pdf 2020 election results]
  39. [https://elections.cdn.sos.ca.gov/sov/2022-general/sov/48-congress.pdf 2022 election results]
  40. [https://elections.cdn.sos.ca.gov/sov/2024-general/sov/48-congress.pdf 2024 election results]{{dead link. (June 2025)
Info: Wikipedia Source

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