Knowledgebase

Items
When Parent Organizations Register Affiliates (or Why Missoula has more nonprofits per capita than any major city)
Defining "The Greater Washington Area" and New York City
County FIPS Codes
Finding zipcodes in a community
Urban and Rural Counties
Assessing the Quality of the FIPS Variable (Technical Note)
Geographic Data in NCCS Databases (Technical Note)
Postal Abbreviations & FIPS codes for U.S. Territories, Possessions, Protectorates and Armed Forces (Helpful Hint)