Proposition 50 and California's congressional redistricting
On November 4, 2025, California voters passed Proposition 50, amending the state’s constitution to adopt new congressional districts for use through the 2030 elections. Proposition 50 replaces congressional districts drawn by the California Citizens Redistricting Commission (CRC) and directs the CRC to resume enacting congressional and all other statewide district maps in 2031.
The legislative package that outlines the legal framework behind Proposition 50 includes three bills: Assembly Constitutional Amendment 8, which is the constitutional amendment itself; Assembly Bill 604 (AB 604), which delineates the new congressional districts; and Senate Bill 280, which scheduled and funded the November 4th special election.
You can view the new congressional district map that is included in AB 604 and compare it to the 2021 congressional districts drawn by the CRC on our interactive map. Or download a shapefile of the AB 604 map, or an AB 604 block equivalency file.
For information on how cities are split across districts or how many cities are in each district, please download our AB 604 city splits report and AB 604 municipalities in district report.
If you would like to create your own district map, community map, or statewide redistricting plan, you can do so by using the Statewide Database's free-to-use mapping tools.
Learn more about California's congressional redistricting on a video
Watch VideoStatewide Database
Welcome to the Statewide Database, California's redistricting database. We are responsible for collecting and processing data for California's decennial redistricting. In 2001, 2011 and 2021, these data were used for Assembly, Senate, Congressional, Board of Equalization, and local redistrictings, as mandated by law. Data collection and processing are ongoing between redistrictings, with precinct level datasets and resources published after each election.
Key Resources
Election
After every statewide election we publish voter registration and voting reports at the precinct level. In addition we create digitized precinct boundary files and data conversion tables. Our data conversion tables make it possible to convert a dataset from one geographic unit to another, for example between precincts and census blocks. These resources can be found under the Election tab.
Redistricting
After each Decennial Census, the Census Bureau provides a census block level redistricting dataset as per Public Law 94-171. We merge the census data with the Statements of Registration and Vote from the previous decades' statewide elections to create a block level dataset that allows for analysis of all three datasets on the same unit of analysis: the census block. Explore the Redistricting tab to find these datasets and other documents from past redistrictings.
District Maps
Assembly, Congressional, Senate, and Board of Equalization District maps, certified by the Citizens Redistricting Commission, are hosted here as well. They can be found as well under the Redistricting tab as an interactive map or in a variety of geographic formats.
Please use our Contact Us or call us at (510) 642-9086 if you would like our assistance with any project concerning our data. We also welcome your feedback on this site. Thank you!
Access Tools for Local Projects
For the 2021 redistricting cycle, the Statewide Database developed free-to-use access tools to help Californians participate in the statewide redistricting process. The tools are still available and can be used to share input with local re/districting efforts and for educational purposes. Since the 2021 redistricting, members of the public have been using our Community of Interest mapping tool , which covers the entire state of California, to create testimony that has shaped their local electoral districts.
Statewide Database additionally developed two district-based tools that are specifically focused on California’s statewide districts.
Learn more about each of these tools at Draw My California
Not sure where to start?
Here are some quick links to help you get started on finding what you need.
Want a quick overview of the Statewide Database?
Latest Updates
Follow the links to access new uploads and the latest versions of data files.
08/15
2025
The 2024 General Election Modoc County data files have been updated
08/12
2025
The 2024 Primary Election Humboldt, Imperial, Mendocino, and Plumas County data files have been updated
07/16
2025
The 2024 Primary Election Modoc and Napa County data files have been updated
07/07
2025
The 2024 General Election Imperial, Mono and Nevada data files have been updated.
06/16
2025
The 2024 General Election Madera County MPREC geography files are now available. These files may be updated when the remaining Madera County files are published
TOP
