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Counties are from Census 2000 SF1, Census 2010 SF1, and Census Gazetteer files. The county codes are FIPS County codes. The first two digits of the FIPS county codes are FIPS State codes.

Jean Roth created the SAS, Stata, and CSV distance files to make the data easier to use.

The size of the file increases with the radius. Smaller files (<= 25 or <= 50 miles) may be easier to use if only County distances <= 25 or <= 50 miles respectively are needed. The ∞ has all combinations of counties.

Census County Names

YearSourceFile Types
1990Gazetteerdta, sas, csv, desc
2000SF1dta, sas, csv, desc
2010SF1dta, sas, csv, desc

Census County Distance Data

YearCensus County Distance (mi)File Types
199025dta, sas, csv, desc
199050dta, sas, csv, desc
1990100dta, sas, csv, desc
1990500dta, sas, csv, desc
1990dta, sas, csv, desc
200025dta, sas, csv, desc
200050dta, sas, csv, desc
2000100dta, sas, csv, desc
2000500dta, sas, csv, desc
2000dta, sas, csv, desc
201025dta, sas, csv, desc
201050dta, sas, csv, desc
2010100dta, sas, csv, desc
2010500dta, sas, csv, desc
2010dta, sas, csv, desc

Updates and changes.

Contact data@nber.org with questions, comments, or suggestions.

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