Redistricting Data (P.L. 94-171) – 2020 Census

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The U.S. Census Bureau released the 2020 Census Redistricting (Public Law 94-171) File for California on August 12, 2021. This file contains total population and population 18 years and older by race and Hispanic/Latino, total housing units, households (occupied units), vacant units, and population by type of group quarters for local geographic areas down to the census block level.

On This Page

  • Historical 2010 and 2020 Comparisons – comparisons of 2010 and 2020 data for California, Counties and Incorporated Cities/Towns.
  • Maps: 2010 to 2020 Population Change and Race/Ethnicity – percent and numeric change from 2010 to 2020, and race/ethnicity detail by county.
  • 2020 Redistricting Data Profiles for California, Counties, and Places.
  • Population and Housing Data for:
    • California, Counties, Cities/Towns, and CDPs
    • Current California Congressional and Legislative Districts
    • Census Tracts
  • Data for Block Groups and Blocks
  • Additional Resources – links to downloads and technical documentation maintained by the Census Bureau.

Historical 2010 and 2020 Comparisons for California, Counties, and Incorporated Cities/Towns

Note: Historical data are provided for geographic areas with legal boundaries only.

  • Rankings of Total Population for Counties and Incorporated Cities/Towns
  • Table H1 — Total Population and Population Change: 2010 and 2020
  • Table H2 — Population and Percent Change by Race (Not Hispanic/Latino) and Hispanic/Latino: 2010 and 2020
  • Table H3 — Housing Units, Households, and Vacant Units: 2010 and 2020

Maps:  2010 to 2020 Population Change and Race/Ethnicity

  • Map 1 — Population Percent Change by County: 2010 to 2020
  • Map 2 — Population Numerical Change by County: 2010 to 2020
  • Map 3 — Race (Not Hispanic/Latino) and Hispanic/Latino by Percent in County: 2010 and 2020
  • Map 4-2010 — Race (Not Hispanic/Latino) and Hispanic/Latino Population Distribution
  • Map 4-2020 — Race (Not Hispanic/Latino) and Hispanic/Latino Population Distribution

Redistricting Data Profiles

These easy-to-use one-page, PDF profiles present the total and 18 years and older population by race (Not Hispanic/Latino) and Hispanic/Latino, housing data, and population by type of group quarters for individual geographic areas:

  • United States
  • California and Counties
  • California Congressional Districts
  • California State Senate Districts
  • California Assembly Districts

Each place within a country:

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Data for California, Counties, Cities/Towns, and Census Designated Places (CDP)

  • Table C1 — Summary Population and Housing Data: 2020
  • Table C2 — Total and 18+ Population by Race (Not Hispanic/Latino) and Hispanic/Latino: 2020
  • Table C3 — Total and 18+ Population by Race (Hispanic/Latino included in Race Groups): 2020
  • Table C4 — Population in Group Quarters by Major Type: 2020
  • Table C5 — Population by Race (Not Hispanic/Latino) with Two or More Races Detail: 2020 — State of California only
  • Table C6 — Population by Race (Hispanic/Latino included in Race Groups) with Two or More Races Detail: 2020 — State of California only
  • Table C7 — Hispanic/Latino by Race with Two or More Races Detail: 2020 — State of California only

Data for Current California State Legislative and Congressional Districts

California Congressional Districts

  • Table CD1 — Summary Population and Housing Data 2020
  • Table CD2 — Total and 18+ Population by Race (Not Hispanic/Latino) and Hispanic/Latino: 2020
  • Table CD3 — Total and 18+ Population by Race (Hispanic/Latino included in Race Groups): 2020
  • Table CD4 — Population in Group Quarters by Major Type: 2020

State Senate Districts

  • Table SD1 — Summary Population and Housing Data: 2020
  • Table SD2 — Total and 18+ Population by Race (Not Hispanic/Latino) and Hispanic/Latino: 2020
  • Table SD3 — Total and 18+ Population by Race (Hispanic/Latino included in Race Groups): 2020
  • Table SD4 — Population in Group Quarters by Major Type: 2020

State Assembly Districts

  • Table AD1 — Summary Population and Housing Data: 2020
  • Table AD2 — Total and 18+ Population by Race (Not Hispanic/Latino) and Hispanic/Latino: 2020
  • Table AD3 — Total and 18+ Population by Race (Hispanic/Latino included in Race Groups): 2020
  • Table AD4 — Population in Group Quarters by Major Type: 2020

Data for Census Tracts

  • Table CT1 — Summary Population and Housing Data: 2020
  • Table CT2 — Total and 18+ Population by Race (Not Hispanic/Latino) and Hispanic/Latino: 2020
  • Table CT3 — Total and 18+ Population by Race (Hispanic/Latino included in Race Groups): 2020
  • Table CT4 — Population by Type of Group Quarters: 2020

Data for Block Groups and Blocks

For block level data, please refer to the Statewide Database, the official redistricting database for the state of California. They have reformatted the legacy format redistricting data file into a user-friendly version.

Additional Resources from the Census Bureau

  • For all geographic areas including census block, download the complete Redistricting Data File and click on “California”. (www2.census.gov)
  • Technical Documentation for Redistricting Data File (www2.census.gov)
  • 2020 Census Redistricting [P.L. 94-171] TIGER / Line Shapefiles (Inputs for geographic information systems) (www2.census.gov)
  • U.S. Census Bureau Redistricting Data website (www.census.gov)
  • 2020 Census PL 94-171 Maps: Census Tracts (www.census.gov)
  • P.L. 94-171 County Block Maps (www.census.gov)

Comments and suggestions? Please e-mail CensusData4CA@dof.ca.gov.