California's 21st Congressional District
California · CA-21
California's 21st Congressional District is one of 52 U.S. House districts in California, represented in Congress by Jim Costa (Democrat). It is home to roughly 781,192 people, with a median age of 32. The population is about 62% Hispanic. The median household income is $61,529, and 17% of adults 25 and older hold a bachelor’s degree or higher. In the 2024 presidential election the district was highly competitive (D+4).
Representative
Current U.S. House member (source: house.gov).
Geography
CA-21 is shown in red. Click a neighboring district to open it, or zoom out to explore the country.
By the Polsby-Popper measure, CA-21 is very irregular in shape compared with other districts.
Presidential results
Two-party presidential vote by district (source: The Downballot).
Who lives here
U.S. Census Bureau, American Community Survey (5-year estimates).
Economy & education
U.S. Census Bureau, American Community Survey (5-year estimates).