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Relationship Files

These text files describe geographic relationships. There are two types of relationship files; those that show the relationship between the same type of geography over time (comparability) and those that show the relationship between two types of geography for the same time period.

2020
  • 2020
  • 2010
  • 2000
2020

Relationship Files

Geographic Relationships Over Time (Comparability)

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

Block Relationship Files

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.

Block Group Relationship Files

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

Census Tract Relationship Files

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

County Subdivision Relationship Files

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

Place Relationship Files

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

ZIP Code Tabulation Areas (ZCTAs) Relationship Files

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.  

Geographic Relationships Between Entity Types

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

American Indian/Alaska Native/Native Hawaiian Area (AIANNH) Relationship Files

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.

Zip Code Tabulation Area 5-Digit (ZCTA5) Relationship Files

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.

 

 

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