County Distance Database
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.
Contact email@example.com with questions, comments, or suggestions.