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The geographic comparability file provides a simple relationship between each 2010 Census county subdivision and its comparable Census 2000 county subdivision (if comparability exists) with an additional comments section to describe more detailed changes. For the vast majority of records, there is a one-to-one relationship between a 2010 Census county subdivision and a Census 2000 county subdivision, although names and codes may have changed between censuses. Where a 2010 Census record has no comparable Census 2000 county subdivision information, it is the result of new subdivisions being created from existing areas or the 2010 Census county subdivisions have changed so dramatically as to preclude any comparability. The NOTES column provides additional information if required.
Comparability for governmental county subdivisions is based on continuing governmental status although there may have been substantial boundary changes or other changes that modified the boundaries. For nonfunctioning legal county subdivisions and statistical entities, comparability is based on the entity still being defined for its "core" area. In some states, most notably Louisiana, Maryland, and Mississippi, county governments completely re-drew the county subdivision boundaries; in these cases the NOTES column uses the term "Redistricted" to indicate a lack of any comparability. Tennessee changed its county subdivisions from statistical census county divisions (CCDs) to legal County Commissioner Districts and there is no comparability for any Tennessee county subdivisions.
All comparability is based on a preliminary compilation and review of data; some changes may appear in later products. The Census Bureau, however, believes this file to be overwhelmingly accurate, and is releasing this preliminary version in response to requests for information about county subdivision relationships. The final version of this file is expected to be released in the first quarter of 2012.
Note: In the Excel file, there are three GEOID10 records - 3706794068, 3711993268, and 3910383426 - where the number of characters used in the NOTES column exceeds the ability to display the text in Excel.Microsoft Excel File (Compressed) [1.1MB] Text File (Compressed) [0.5MB]
|GEOID10||Concatenated STATEFP10 + COUNTYFP10 + COUSUBFP10|
|STATEFP10||2010 Census 2-digit FIPS State Code|
|COUNTYFP10||2010 Census 3-digit FIPS County Code|
|COUSUBFP10||2010 Census 5-digit County Subdivision Code|
|ANSICODE10||2010 Census 8-digit ANSI Code|
|NAMELSAD10||2010 Census Place Name with Legal/Statistical Area Description|
|FULLNAMELSAD10||2010 Census Place Name with Legal/Statistical Area Description plus County Name with Legal/Statistical Area Description and State Name|
|GEOID00||Concatenated STATEFP00 + COUNTYFP00 + COUSUBFP00|
|STATEFP00||Census 2000 2-digit FIPS State Code|
|COUNTYFP00||Census 2000 3-digit FIPS County Code|
|COUSUBFP00||Census 2000 5-digit FIPS County Subdivision Code|
|NAMELSAD00||Census 2000 Place Name with Legal/Statistical Area Description|
|NOTES||Notes showing more detailed changes|
A NOTE is included when:
No NOTE implies exact or near exact comparability between the listed 2010 Census and Census 2000 county entities.