Founded in 1858, Frio County is one of 254 counties in the state of Texas. Historically, Frio County was formed from Atascosa County, Bexar County and Uvalde County. The city of Pearsall is the county seat. With FIPS code of 163, Frio County has a population of 18,436 and area of 1,133 square miles (2,934 km2).
List of all cities in Frio County, TX alphabetically
| City/Town | Postal Code | Area Code |
| Bigfoot, TX | 78005 | 830 |
| Derby, TX | 78017 | 830 |
| Dilley, TX | 78017 | 830 |
| Divot, TX | 78017 | 830 |
| Frio Town, TX | 78061 | 830 |
| Moore, TX | 78057 | 830 |
| Pearsall, TX | 78061 | 830 |