The Census Bureau has published FIPS codes in census products for more than 30 years. ... FIPS codes for smaller geographic entities are usually unique within larger geographic entities. For example, FIPS state codes are unique within nation and FIPS county codes are unique within state.

Can a county have more than one FIPS code?

State/County FIPS codes can be further paired with census tracts and block groups. These two subsequent geographies are nested within the larger regions using a 12-digit numeric code; state (00) county (000) census tract (000000) block group (0).

What makes up a FIPS code?

A census tract FIPS code is an 11-digit number that uniquely identifies each census tract in the United States. It is a concatentation of - reading from left to right - the 2-digit state code, the 3-digit county code, and the 6-digit tract code.