PolitiFinder

2024 California U.S. House District 21 Election

California · 2 candidates · See every 2024 U.S. House race

Who won the 2024 California U.S. House District 21 Election?

Jim Costa won the 2024 California U.S. House District 21 Election. Jim Costa received 102,798 popular votes (52.57%). The main challenger was Michael Maher (47.43%).

See the full head-to-head between Costa and Maher

Costa +5.1 pts · won by 10,065 votes
Jim CostaDemocraticWINNER52.57%
102,798 votes
Michael MaherRepublican47.43%
92,733 votes
Popular-vote totals for U.S. House elections come from the MIT Election Data and Science Lab (1976–2024).

Data last verified July 28, 2026.