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California's 21st U.S. House District

California · Next election 2026 · 2 active candidates · $2.1M raisedFederal
About This Office

U.S. House seat for California's 21st congressional district. Representatives serve two-year terms.

Total Seats
435
Term Length
2 years
Salary
$174,000
Current Officeholders
Rep. Jim Costa
Rep. Jim CostaD
U.S. Representative · CA-021
Tenure
21y
Bills Spon.
29
Votes Missed
4.03%
Cross-party
108
Committees
Ranking MemberLivestock, Dairy and Poultry Subcommittee
Foreign Affairs Committee
Agriculture Committee
+3 more
The 2026 Race

6 candidates filed, 2 active for the 2026 House election in California District 21. General election on Nov 3, 2026.

Primary
—
General
Nov 3, 2026
Total Raised
$2.1M
Candidates
2 active / 6 filed
Incumbent
Jim Costa (D-CA-21)D
Cash on Hand
$1.0M
Election History
YearWinnerResultRunner-UpTotal Votes
2024Jim Costa D52.6%Michael Maher R 47.4%195,531
2022Jim Costa D54.2%Michael Maher R 45.8%125,647
2020David G Valadao R50.4%Tj Cox D 49.6%170,334
2018Tj Cox D50.4%David G Valadao R 49.6%113,616
2016David G Valadao R56.7%Emilio Huerta D 43.3%132,408
2014David G Valadao R57.8%Amanda Renteria D 42.2%79,377
2012David G Valadao R57.8%John Hernandez D 42.2%116,283
2010Devin Nunes R100.0%—135,979
2008Devin Nunes R68.4%Larry Johnson D 31.6%209,815
2006Devin Nunes R66.7%Steven Haze D 29.9%142,661
2004Devin Nunes R73.2%Fred B Davis D 26.8%192,315
2002Devin Nunes R70.5%David G Lapere D 26.2%124,198
2000William M Thomas R71.6%Pedro \"Pete\" Martinez Jr D 24.8%199,100
1998William M Thomas R78.9%John Evans O 21.1%146,983
1996William M Thomas R65.9%Deborah A Vollmer D 26.5%191,152
District
Population
758,000
Median HH Income
$65K
Unemployment
10.1%
Bachelor's+
17.1%
Veterans
3.7%
Median Age
31.9
Mean HH Income
$86K
Poverty Rate
21.9%
HS or Higher
74.4%
Median Home Value
$334K
Median Rent
$1,293/mo
Owner-Occupied
52.1%
Under 18 / 65+
29.4% / 11.3%