1934 Wisconsin lieutenant gubernatorial election

The 1934 Wisconsin lieutenant gubernatorial election was held on November 6, 1934, in order to elect the lieutenant governor of Wisconsin. Incumbent Democratic lieutenant governor Thomas J. O'Malley defeated Progressive nominee Henry Gunderson, Republican nominee Waldemar C. Wehe and Socialist nominee Robert Buech.

The Democratic primary election was held on September 18, 1934. Incumbent lieutenant governor Thomas J. O'Malley received a majority of the votes (63.97%) against candidate and incumbent state administrator of the Civil Works Administration Robert C. Johnson, and was thus elected as the nominee for the general election. Despite winning the primary, O'Malley was abandoned by the state party apparatus in the general election, but went on to win re-election without their support. His victory was partially aided by the emergence of the Wisconsin Progressive Party, which caused a three-way split of the major party votes.

On election day, November 6, 1934, incumbent Democratic lieutenant governor Thomas J. O'Malley won re-election by a margin of 9,191 votes against his foremost opponent Progressive nominee Henry Gunderson, thereby retaining Democratic control over the office of lieutenant governor. O'Malley was sworn in for his second term on January 7, 1935.