Welcome to California's official 2021 Redistricting Database. On this page you will find California's official datasets for state and local redistricting.. The datasets available consist of the Census bureau’s P.L. 94-171 file, adjusted per California law to reallocate data about certain incarcerated populations to their last known residential address; Citizen Voting Age Population from the 2015-2019 American Community Survey; and Voter Registration and Returns for Statewide Elections. Each of these datasets is released on 2020 Census Block Geography. We provide more detailed information about these datasets on their respective pages.

In the days following September 20, 2021, we will release additional datafiles that you may find helpful. We will also release documentation for all of the files that make up the redistricting dataset. All new additions to these data will be listed on our What’s New feed on the home page. Please note that the data we’ve released are extraordinarily complex and, in order to facilitate the start of line drawing throughout the state, were built and released over a very short timeframe. While we do not anticipate finding significant issues with these files, should the need arise to replace any of them, this will also be noted on the What’s New feed. Please keep an eye on this feed to make sure you are always working with the most recent files.

Official Redistricting Database

Visit our 2021 Redistricting Database page for more information about the official Redistricting Database for California, published by Statewide Database on September 20, 2021. The database contains the following datasets:

  • The Census Bureau’s P.L. 94-171 Redistricting Data file, adjusted to reflect certain incarcerated persons at their last residential address. The adjusted tables are P2, P4, P5 all by 2020 census block.
  • 2015-2019 Citizen Voting Age Population on 2020 Census Blocks
  • Voter Registration and Statement of Vote Data on 2020 Census Blocks

The Redistricting Database files are available on our download pages at the Statewide, County, and City levels:

Summary files are also available with total Adjusted P.L 94-171 data by city, county, and the state as a whole.

Participation and Access

The California Citizens Redistricting Commission (CRC) is collecting information from communities all over California, and will use this information to help create California’s new statewide election districts. The Statewide Database developed an online tool called Draw My CA Community and has been collaborating with the California Citizens Redistricting Commission to help Californians participate in this process. The Statewide Database has also developed two mapping tools that can be used to create districts. One is an online tool called ‘Draw My California Districts’ and the other one is a desktop plug-in for QGIS, an open source Geographic Information System software. The two district mapping tools will become available within days after the release of the official redistricting database, as soon as the data are loaded and integrated. The QGIS plug-in can be downloaded and installed on any PC. The online redistricting software can be used from any computer. Technical assistance is available online via chat or by calling us at 510-280-3305.

Learn more about this project at Draw My California.

The Statewide Database has opened Redistricting Access Centers in six locations throughout the State of California. Each Center is staffed by a site manager who can provide access to one of the centers’ computers that have the mapping tools loaded. You can also receive in-person technical support for all of our redistricting access tools by visiting a Redistricting Access Center. Schedule a virtual appointment for technical support for any of our access tools here.

Data Release Timeline

  • August 12, 2021: The Census Bureau released the P.L. 94-171 Redistricting Data in a "legacy" text format.
  • August 18, 2021: The Statewide Database released the P.L. 94-171 "legacy" format data in an easier-to-use reformatted version, including county and city specific datasets.
  • September 16, 2021: The Census Bureau releases the P.L. 94-171 Redistricting Data in easier-to-use formats, with data extraction tools
  • September 20, 2021: The Statewide Database releases California's Official Redistricting Database including: :
    • Adjusted, inmate reallocated P.L. 94-171 Redistricting Data on 2020 Census Block geography
    • Electoral datasets (Voter Registration and Statement of Vote) on 2020 Census Block geography
    • Citizen Voting Age Population tabulations on 2020 Census Block geography

For more information on the Census Bureau's timeline and data releases, please visit the Census Redistricting Data Program and Redistricting Data Program Management pages.

For more information on the California Citizens Redistricting Commission's timeline, please visit the CRC's Timeline page.

Preliminary Datasets

Reformatted and Validated P.L. 94-171 "Legacy" Data

  • Reformatted Legacy Data: These data are reformatted into easier-to-use tabulated files and are provided for download on the State, County and City levels. An adjusted, inmate reallocated version of this dataset will be part of the official Redistricting Database.

Citizen Voting Age Population by Race and Ethnicity

  • 2015-2019 CVAP on 2010 Census Blocks: This dataset provides the CVAP Special Tabulation on the 2010 Census Blocks. An updated 2020 Census Block version is included in the official Redistricting Database.

Historical Redistricting Data