Census of Population and Housing, 2000 [United States]: Census Tract Relationship Files (CTRF) (ICPSR 13287)

Published: Jan 12, 2006

Principal Investigator(s):
United States Department of Commerce. Bureau of the Census



Version V1

Part of the Census 2000 geographic product series, Census Tract Relationship Files (CTRF) show how 1990 census tracts relate to 2000 census tracts. The files consist of one record for each 1990 census tract/2000 census tract spatial set. A spatial census tract set is defined as the area that is uniquely shared between a 1990 census tract and a 2000 census tract. The CTRF consist of sets of four files for each of the United States and territories. The purpose of these files is to assist users in determining the relationships between 1990 and 2000 census tracts. Two of these files are state-level entity-based census tract relationship files, one providing a measurement of change based on population, the second measures change using street-side mileage. The other two files specifically list census tracts that have experienced significant change (2.5 percent or greater): one from the perspective of 1990 census tracts, the other from the perspective of Census 2000. A set of files for the United States as a whole is also provided.

United States Department of Commerce. Bureau of the Census. Census of Population and Housing, 2000 [United States]: Census Tract Relationship Files (CTRF). Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 2006-01-12. https://doi.org/10.3886/ICPSR13287.v1

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When complete, the data collection will include 57 sets of files, one set for each of the 50 states plus separate files for the United States as a whole, the District of Columbia, Puerto Rico, American Samoa, Guam, the Northern Mariana Islands, and the U.S. Virgin Islands.

In previous censuses, these files were called "comparability" files instead of relationship files.

All census tracts in the United States and its territories whose boundaries and/or population counts changed between the 1990 and 2000 censuses.

United States Bureau of the Census's internal TIGER database

survey data



2006-01-12 All files were removed from dataset 229 and flagged as study-level files, so that they will accompany all downloads.


  • The public-use data files in this collection are available for access by the general public. Access does not require affiliation with an ICPSR member institution.

  • The citation of this study may have changed due to the new version control system that has been implemented.
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