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California's 21st district

U.S. House district profile: the sitting representative, 2024 Census demographics (119th-district boundaries), partisan lean, and 2026 race rating.

Representative

Official portrait of Jim Costa

Jim Costa

CA · District 21
DemocratRanking Member, Livestock, Dairy, and PoultryCook: Likely D
Raised $1,338,630 · 46K followers (office + personal) · missed 1.9% of votes
21.7 years in Congress · Up for reelection: 2026
House Committee on Agriculture · House Committee on Foreign Affairs +3 more
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Cook PVI: D+5

2026 race rating: Likely D

District demographics

MeasureValue
Population775,200
Median household income$66,399
Median age32.3
Bachelor's degree or higher17.6%
White alone16.8%
Black alone4.2%
Hispanic or Latino67.1%
Asian alone9.1%
Unemployment rate10.0%
Population density (per sq mi)870

Source: U.S. Census Bureau, 2024 American Community Survey 1-year estimates (tables B01003, B01002, B19013 and related), 119th Congress district boundaries, released September 2025; land area from the 2025 Gazetteer.