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.

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.

Other related resources:

Participation and Access

The California Citizens Redistricting Commission (CRC) collected information from communities all over California to use to help create California's new statewide election districts. The Statewide Database developed an online tool called Draw My CA Community and collaborated with the California Citizens Redistricting Commission to help Californians participate in this process. The Statewide Database 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 QGIS plug-in can be downloaded and installed on any PC. The online redistricting software can be used from any computer.

Learn more about this project at Draw My California.

The Statewide Database also opened Redistricting Access Centers in six locations throughout the State of California. Each Center was staffed by a site manager who could provide technical assistance and access to one of the centers' computers with the mapping tools loaded.

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 released the P.L. 94-171 Redistricting Data in easier-to-use formats, with data extraction tools
  • September 20, 2021: The Statewide Database released 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