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The Redistricting
Database for the
State of California

Census, voting, registration, and geographic data sets for
statewide elections beginning in 1992.

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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 and 2011, 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!

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