PolitiFinder

1938 California U.S. House District 15 Election

California · 3 candidates · See every 1938 U.S. House race

Who won the 1938 California U.S. House District 15 Election?

John Costello won the 1938 California U.S. House District 15 Election. John Costello received 83,086 popular votes (60.15%). The main challenger was O D Thomas (37.27%).

See the full head-to-head between Costello and Thomas

Costello +22.9 pts · won by 31,603 votes
John CostelloDemocraticWINNER60.15%
83,086 votes
O D ThomasRepublican37.27%
51,483 votes
Emil Freedcommunist2.14%
2,951 votes
Popular-vote totals for this U.S. House election come from the Constituency-Level Elections Archive (CLEA) and the official public record.

Data last verified July 28, 2026.