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Reference Files

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Reference Files

Geographic Reference Files are documents that list codes for geographic entities. These include Relationship Files, Gazetteer Files, Block Assignment Files, and Tally Files.

Relationship Files describe geographic relationships over time and between types. Geographic Relationships Over Time show the relationships (comparability) for the same type of geography over different periods of time (e.g. the relationship between places in 2010 and 2000). Geographic Relationships Between Entity Types show the relationship between different types of geography for the same period (e.g. the relationships between congressional districts and places).

Gazetteer Files list geographic entities, such as county, place, and census tracts, with information on name, geographic code, population, housing unit counts, and latitude/longitude of the internal point.

Block Assignment Files (BAFs) are among the geographic products that the Census Bureau provides to states and other data users containing the small area census data necessary for legislative redistricting.

Tally Files provide the total number of geographic entities for a given area. For example, the 2010 Census National Geographic Tallies list 11,078,297 census blocks and 3,143 counties and equivalents.

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2024 SDRP Annotation Phase Listing Files

Here are the 2024 SDRP School District Listing Files for the Annotation Phase.

Current Address Count Listing Files

Here are the current Address Count Listing Files.

2023 SDRP Annotation Phase Listing Files

Here are the 2023 SDRP School District Listing Files for the Annotation Phase.

Current Address Count Listing Files

Here are the current Address Count Listing Files.

Legal Boundary Change/Annexation Data

Review the annexations and legal boundary changes that have been reported to the BAS.

2022 SDRP Annotation Phase Listing Files

Here are the 2022 SDRP School District Listing Files for the Annotation Phase.

New Incorporations, Mergers, Consolidations, and Disincorporations

View a list of the governments that have been established, merged/consolidated, or ceased to exist since 2010.

2020 Address Count Listing Files

Here are the 2020 Address Count Listing Files.

2006-2010 County Sets

The EEO county set combines multiple counties to meet the 50,000 person requirement.

State Area Measurements and Internal Point Coordinates

This table provides land, water and total area measurements for the 50 states, the District of Columbia, Puerto Rico and the Island Areas.

1999 MA to 2003 CBSA

This reference file shows the relationship between 1999 MAs and 2003 CBSAs.

Geographic Classifications - County Sets

View and download reference files on county sets for 2000.

2009 Census Bureau Region and Division Codes and State FIPS Codes

These are the 2009 Census Bureau Region and Division Codes and State FIPS Codes.

2009 Population Estimates FIPS Codes

These are the 2009 FIPS Codes (State, County, MCD, and Incorporated Place).

2011 Census Bureau Region and Division Codes and State FIPS Codes

These are the 2011 Census Bureau Region and Division Codes and State FIPS Codes.

2011 Population Estimates FIPS Codes

These are the 2011 FIPS Codes (State, County, MCD, and Incorporated Place).

2012 Census Bureau Region and Division Codes and State FIPS Codes

These are the 2012 Census Bureau Region and Division Codes and State FIPS Codes.

2012 Population Estimates FIPS Codes

These are the 2012 FIPS Codes (State, County, MCD, and Incorporated Place).

2013 Census Bureau Region and Division Codes and State FIPS Codes

These are the 2013 Census Bureau Region and Division Codes and State FIPS Codes.

2013 Population Estimates FIPS Codes

These are the 2013 FIPS Codes (State, County, MCD, and Incorporated Place).

2014 Census Bureau Region and Division Codes and State FIPS Codes

These are the 2014 Census Bureau Region and Division Codes and State FIPS Codes.

2014 Population Estimates FIPS Codes

These are the 2014 FIPS Codes (State, County, MCD, and Incorporated Place).

2015 Population Estimates FIPS Codes

These are the Vintage 2015 Census Bureau Region and Division Codes, and State, County, Minor Civil Division, and Incorporated Place FIPS Codes.

2016 Population Estimates FIPS Codes

These are the Vintage 2016 Census Bureau Region and Division Codes, and State, County, Minor Civil Division, and Incorporated Place FIPS Codes.

2017 Population Estimates FIPS Codes

These are the Vintage 2017 Census Bureau Region and Division Codes, and State, County, Minor Civil Division, and Incorporated Place FIPS Codes.

2018 Population Estimates FIPS Codes

These are the Vintage 2018 Census Bureau Region and Division Codes, and State, County, Minor Civil Division, and Incorporated Place FIPS Codes.

2019 Population Estimates FIPS Codes

These are the Vintage 2019 Census Bureau Region and Division Codes, and State, County, Minor Civil Division, and Incorporated Place.

2020 Population Estimates FIPS Codes

These are the Vintage 2020 Census Bureau Region and Division Codes, and State, County, Minor Civil Division, and Incorporated Place.

2021 Population Estimates FIPS Codes

These are the Vintage 2021 Census Bureau Region and Division Codes, and State, County, Minor Civil Division, and Incorporated Place.

2022 Population Estimates FIPS Codes

These are the Vintage 2022 Census Bureau Region and Division Codes, and State, County, Minor Civil Division, and Incorporated Place.

Block Assignment Files

View the available Block Assignment files from the Geography program.

Centers of Population

Information about the mean and median centers of population for the 2020 Census, 2010 Census and Census 2000.

County Adjacency File

View the available County Adjaceny files from the Geography program.

Gazetteer Files

View all the available Gazetteer files from the Geography Program.

Guide to 2010 State and Local Census Geography

These pages provide an overview of census geography and have information about key geographic concepts for each state as it relates to the 2010 Census.

Historical State Centers of Population by State for 1880-2020 Censuses

The concept of the center of population as used by the U.S. Census Bureau is that of a balance point.

Page Last Revised - September 14, 2022

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