What's happening with California's congressional redistricting?
On August 21, 2025, the California State Legislature passed Assembly Bill 604 (AB 604) to amend the state’s constitution and ask voters whether or not California should adopt new congressional districts for use through the 2030 elections. Provisions of the legislation include retaining the California Citizens Redistricting Commission and keeping California's congressional maps as they are currently drawn if other states do not redraw theirs.
The proposed constitutional amendment will go before voters on November 4, 2025, giving California voters the final say on whether to adopt the new congressional districts.
Read the text of AB 604 here. The legislative package on congressional redistricting additionally includes ACA 8 and SB 280.
You can view the congressional district map that is included in AB 604 and compare it to the current congressional districts on our interactive map. Click here to download a shapefile of the AB 604 map, or click here to download a block equivalency file.
Public Input: The State of California is encouraging members of the public to provide input on this process. People who live in California can share their feedback about the mid-decade congressional redistricting on the Senate and Assembly.
If you would like to create your own district map, community map, or statewide redistricting plan to share with the state legislature, you can do so by using the Statewide Database's free-to-use mapping tools.
Statewide 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
