These Congressional districts were established by the voters of California with the passage of Proposition 50 (2025) on November 4, 2025 and will go into effect after the November 2026 elections and upon seating of the 120th Congress, January 3, 2027. The districts will stay in use until the California Citizens Redistricting Commission draws new maps following the 2030 U.S. Census.
Congressional District's Map and Census Reports
Names in CAPITALS denote counties that are wholly contained within the boundaries of the district.
| DIST | Counties Represented |
|---|---|
| CD01 | BUTTE, GLENN, Lake, LASSEN, Mendocino, PLUMAS, SIERRA, Sonoma, TEHAMA |
| CD02 | DEL NORTE, HUMBOLDT, MARIN, Mendocino, MODOC, SHASTA, SISKIYOU, Sonoma, TRINITY |
| CD03 | El Dorado, NEVADA, Placer, Sacramento, COLUSA |
| CD04 | Lake, NAPA, Placer, Sacramento, Sonoma, SUTTER, Yolo, YUBA |
| CD05 | ALPINE, AMADOR, CALAVERAS, El Dorado, Fresno, INYO, Madera, MARIPOSA, MONO, San Joaquin, Stanislaus, TUOLUMNE |
| CD06 | Placer, Sacramento, Yolo |
| CD07 | El Dorado, Sacramento, San Joaquin |
| CD08 | Contra Costa, Sacramento, San Joaquin, SOLANO, Yolo |
| CD09 | Contra Costa, San Joaquin |
| CD10 | Alameda, Contra Costa |
| CD11 | San Francisco |
| CD12 | Alameda |
| CD13 | Fresno, Madera, MERCED, San Joaquin, Stanislaus |
| CD14 | Alameda |
| CD15 | San Francisco, San Mateo |
| CD16 | San Mateo, Santa Clara |
| CD17 | Alameda, Santa Clara |
| CD18 | Fresno, Kings, Monterey, SAN BENITO, Santa Clara, Santa Cruz |
| CD19 | Monterey, San Luis Obispo, Santa Clara, Santa Cruz |
| CD20 | Fresno, Kern, Kings, Tulare |
| CD21 | Fresno, Tulare |
| CD22 | Fresno, Kern, Kings, Madera, Tulare |
| CD23 | Kern, Los Angeles, Riverside, San Bernardino |
| CD24 | San Luis Obispo, SANTA BARBARA, Ventura |
| CD25 | IMPERIAL, Riverside, San Bernardino |
| CD26 | Los Angeles, Ventura |
| CD27 | Los Angeles |
| CD28 | Los Angeles, San Bernardino |
| CD29 | Los Angeles |
| CD30 | Los Angeles |
| CD31 | Los Angeles, San Bernardino |
| CD32 | Los Angeles, Ventura |
| CD33 | Riverside, San Bernardino |
| CD34 | Los Angeles |
| CD35 | Los Angeles, Riverside, San Bernardino |
| CD36 | Los Angeles |
| CD37 | Los Angeles |
| CD38 | Los Angeles, Orange |
| CD39 | Riverside |
| CD40 | Orange, Riverside |
| CD41 | Los Angeles, Orange |
| CD42 | Los Angeles, Orange |
| CD43 | Los Angeles |
| CD44 | Los Angeles |
| CD45 | Los Angeles, Orange |
| CD46 | Orange |
| CD47 | Orange |
| CD48 | Riverside, San Diego |
| CD49 | Orange, San Diego |
| CD50 | San Diego |
| CD51 | San Diego |
| CD52 | San Diego |
Statewide Maps and Reports
- 2025 California Congressional Districts Statewide Map (Letter Size PDF)
- AB 604 city splits report (PDF from UC Berkeley Statewide Database)
- AB 604 municipalities in district report (PDF from UC Berkeley Statewide Database)
AB 604 - Chaptered 8/21/2025 – Chapter 96, Statutes of 2025
Legislation
- AB 604 - Proposed Congressional Maps
- ACA 8 - Redistricting Constitutional Amendment
- SB 280 - Election Administration and Funding
Downloadable Files
Source: Senate Standing Committee on Elections and Constitutional Amendments
- AB 604 District Shapefile (ZIP)
- AB 604 Districts Equivalency File (CSV)
- AB 604 Districts Atlas (PDF)
- AB 604 Redistricting File (ZIP)
SHA-512 Digital Signature for AB604 Redistricting File (ZIP)
d4d870d414f8b1cec2ae79aafb85960716f938dbef345023e075c6b72180ae387dc3c428ae591a6b9b3721253fe0d98dc27289ba0982078dc2ecc12f94f05829
Interactive Map
Senate Office of Demographics 02/2026