Our geographic relationship files describe the relationships between different types of geographies and boundary changes over time.
Geographic Equivalencies show the relationship between different types of geographies for the same period (e.g., the relationships between 2020 census tracts and DCP’s updated Neighborhood Tabulation Areas and new Community District Tabulation Areas).
Boundary Changes show the relationships (comparability) for census tracts over different periods of time (e.g., the relationship between 2010 and 2000 census tracts).
To review definitions of geographical terms such as “census tract” and “community district,” visit our geographies glossary.
This guide to NYC’s 2020 geographies provides an overview of new Community District Tabulation Areas, updated Neighborhood Tabulation Areas, and the changes to census tracts
Interactive maps showing the new 2020 census geographies and how they have changed since 2010
Download files for 2020 census tracts, census blocks, Neighborhood Tabulation Areas, and Community District Tabulation Areas
For 2010 census tracts that were split by 2020 census tracts, this shows the proportion of the 2010 tract population allocated to each component 2020 tract
Relationship file for 2020 census tracts and Neighborhood Tabulation Areas and Community District Tabulation Areas
Relationship file for 2020 census blocks and census tracts, Neighborhood Tabulation Areas, and Community District Tabulation Areas
2010 and Earlier
2010 Census Tract/ NTA/PUMA Equivalencies
A file that shows the relationship between 2010 census tracts, Neighborhood Tabulation Areas (NTAs) and Public Use Microdata Areas (PUMAs)
A map showing the relationship between Public Use Microdata Areas (PUMAs) and Community Districts
Maps of New York City’s Neighborhood Tabulation Areas (NTAs)
Maps of New York City’s Neighborhood Tabulation Areas (NTAs) by Census Tract
2000 Census Tract/Community District Equivalencies
New York City 2000 Census Tracts within Community Districts.
2000 to 2010 Census Tracts
2000 to 2010 Census Tract boundary/
1990 to 2000 Census Tracts
1990 to 2000 Census Tract boundary/
1990 to 2000 Census Blocks
1990 to 2000 Census Block equivalency
2000 Population Shifts
Population shifts as a Result of Census Tract boundary changes between 1990 and 2000
2010 geographic notes on Community Districts
2000 geographic notes on Community Districts
The Construction of Community District Geography in 2000 Census Files
2000 Designation of Open Space and Suppression Notes
Suppression of 2000 Census Tract data in maps