Science and Environment
Amphibians and Reptiles in Frio County, Butterflies of Frio County, Texas, Moths of Frio County, Texas
Frio County QuickFacts from the US Census Bureau
Population, demographic, and housing information from the 1990 census. Link to Tiger map of the county.
Handbook of Texas Online
Current and historical information about Frio County.
YB Lost - Frio County, Texas
Provides names and addresses of county public officials and departments.