PolitiFinder

1940 California U.S. House District 15 Election

California · 3 candidates · See every 1940 U.S. House race

Who won the 1940 California U.S. House District 15 Election?

John Costello won the 1940 California U.S. House District 15 Election. John Costello received 94,435 popular votes (56.16%). The main challenger was Norris J Nelson (42.62%).

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

Costello +13.5 pts · won by 22,768 votes
John CostelloDemocraticWINNER56.16%
94,435 votes
Norris J NelsonRepublican42.62%
71,667 votes
Emil Freedcommunist1.19%
2,004 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.