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Counties are from Census 2000 SF1 and Census 2010 SF1 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

Year Source File Types
1990 Gazetteer dta, sas, csv, desc
2000 SF1 dta, sas, csv, desc
2010 SF1 dta, sas, csv, desc

Census County Distance Data

Year Census County Distance (mi) File Types
1990 25 dta, sas, csv, desc
1990 50 dta, sas, csv, desc
1990 100 dta, sas, csv, desc
1990 500 dta, sas, csv, desc
1990 dta, sas, csv, desc
2000 25 dta, sas, csv, desc
2000 50 dta, sas, csv, desc
2000 100 dta, sas, csv, desc
2000 500 dta, sas, csv, desc
2000 dta, sas, csv, desc
2010 25 dta, sas, csv, desc
2010 50 dta, sas, csv, desc
2010 100 dta, sas, csv, desc
2010 500 dta, sas, csv, desc
2010 dta, sas, csv, desc

Updates and changes.

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

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