California's 21st District: 2026 result

• New lines: California redrew its congressional districts for 2026, so this result is not compared with the 2024 result under the old map.
• Democratic hold in an open district: Jim Costa succeeds Jim Costa, who was not on the ballot.
• Cook Partisan Voting Index for the district, on its 2026 lines: D+5.

California's congressional districts changed for 2026. The district numbered 21 in 2024 covered a different area, so its 2024 results are not set beside this one.

• California: every 2026 House district, the delegation before and after
• Other districts in California: CA-1, CA-2, CA-3, CA-4, CA-5, CA-6, CA-7, CA-8, CA-9, CA-10, CA-11, CA-12, CA-13, CA-14, CA-15, CA-16, CA-17, CA-18, CA-19, CA-20, CA-22, CA-23, CA-24, CA-25, CA-26, CA-27, CA-28, CA-29, CA-30, CA-31, CA-32, CA-33, CA-34, CA-35, CA-36, CA-37, CA-38, CA-39, CA-40, CA-41, CA-42, CA-43, CA-44, CA-45, CA-46, CA-47, CA-48, CA-49, CA-50, CA-51, CA-52
• California governor's race · Xavier Becerra (D)
• Closest House races: MN-1 (0.1), NC-5 (0.1), NC-3 (0.1), TN-4 (0.2), FL-27 (0.4)
• House results 2026: every race

• Votes and candidates: Wikipedia, 2026 United States House of Representatives elections in California (revision 1384901875, November 10 at 1:37 PM EST), which cites the state election office and AP race calls.
• Race call and incumbent: Wikipedia, 2026 United States House of Representatives elections (revision 1385103391). A race is shown as called only when that article marks a winner.
• Text and figures from Wikipedia are available under CC BY-SA 4.0. Results are unofficial until the state certifies them; this page updates with the source.