Relationship files for 2020 do not include housing or population counts.

There are supplemental files (not relationship files) included on this page for Congressional Districts and State Legislative Districts. These are the urban/rural population and land area files and are only produced for these three geographies. Congressional Districts also have the land area file linked on this page. 

• Geographic Relationships Over Time (Comparability)
  • Block
    
  • Block Group
    
  • Census Tract
  • County Subdivision
  • Place
  • Public Use Microdata Areas (PUMAs)
    
  • Urban Areas
  • ZIP Code Tabulation Areas (ZCTAs)
• Geographic Relationships Between Entity Types
  • 118th Congressional Districts
  • American Indian/Alaska Native/Native Hawaiian Area (AIANNH)
  • Public Use Microdata Areas (PUMAs)
  • State Legislative District - Lower Chamber
  • State Legislative District - Upper Chamber
  • Urban Areas
  • ZIP Code Tabulation Areas (ZCTAs)

These files show the relationships (comparability) for the same type of geography over different periods of time.

The 2020 Census Redistricting Data (P.L. 94-171) Block Relationship files are provided as a tool to help users compare the universe of 2010 Census tabulation blocks to the universe of 2020 Census tabulation blocks. The Block Relationship files are created for each of the 50 states, the District of Columbia, and the Commonwealth of Puerto Rico.

The 2020 block group relationship files provide simple relationships between 2020 block group entities and 2010 block group entities.

The 2020 census tract relationship files provide simple relationships between 2020 census tract entities and 2010 census tract entities.

The 2020 county subdivision relationship files provide simple relationships between 2020 county subdivision entities and 2010 county subdivision entities.

The 2020 place relationship files provide simple relationships between 2020 place/census designated place (CDP) entities and 2010 place/CDP entities.

The 2020 to 2010 Public Use Microdata Area (PUMA) relationship file provides simple relationships between 2020 Public Use Microdata Area (PUMA) entities and 2010 Public Use Microdata Area (PUMA) entities.

The 2010 to 2020 Urban Area relationship file provides relationships between the 2010 Census Urban Area entities and updated 2020 Census Urban Area entities.

The 2020 Census ZIP Code Tabulation Areas (ZCTAs) Relationship file is provided as a tool to help users compare the universe of 2010 Census ZCTAs to the universe of 2020 Census ZCTAs.  

These files show the relationship between different types of geography for the same time period (e.g., the relationships between congressional districts and places).  

The 2020 118^th Congressional District relationship files provide simple relationships between the 2020 118^th Congressional Districts entities and other 2020 Census tabulation geography.

The 2020 American Indian/Alaska Native/Native Hawaiian Area (AIANNH) relationship files provide simple relationships between the 2020 AIANNH entities and other 2020 Census tabulation geography.

The 2020 PUMA Relationship files provide simple relationships between the 2020 PUMA entities and other 2020 Census tabulation geography.

The 2020 SLDL Relationship files provide simple relationships between the 2020 SLDL entities for the 2022 legislative year and other 2020 Census tabulation geography.

The 2020 SLDU Relationship files provide simple relationships between the 2020 SLDU entities for the 2022 legislative year and other 2020 Census tabulation geography.

The 2020 Urban Area relationship files provide simple relationships between the 2020 Urban Area entities and other 2020 Census tabulation geography.

The 2020 ZIP Code Tabulation Area 5-Digit (ZCTA5) Relationship files provide simple relationships between the 2020 ZCTA5 entities and other 2020 Census tabulation geography.