- Frio county was created in 1858. Its name, Frio, is the Spanish would for ‘cold’, and It is named after the Frio river.
- “Frio” is pronounced as Free-O.
- The county has no slogan yet.
- The county covers an area of 1,134 sq. mi. (2,940 km2).
- The City of Pearsall serves as the county seat and is located in the center of the county.
- The ghost town of Frio Town was once known as the “cowboy capital” and cultural center of the county during the 1870s.
- The decline of Frio Town occurred over time with people leaving for the establishment of Pearsall alongside a railroad route. Mrs. A. C. Roberts owned most of Frio town by 1953 and the population was in the 50s. By the 1990s, Frio Town was all-but-abandoned.
- George Strait’s song “All My Ex’s Live in Texas” mentions the Frio river as the artist grew up in this county.
- Atascosa County (East)
- Dimmit County (Southwest)
- La Salle County (South)
- Medina County (North)
- Zavala County (West)
- Frio Town, once known as “Frio City” before 1886.
- Frio River