Founded in 1858, Blanco County is one of 254 counties in the state of Texas. Historically, Blanco County was formed from Burnet County, Comal County, Gillespie County and Hays County. The city of Johnson City is the county seat. With FIPS code of 31, Blanco County has a population of 11,886 and area of 711 square miles (1,841 km2).
List of all cities in Blanco County, TX alphabetically
| City/Town | Postal Code | Area Code |
| Blanco, TX | 78606 | 830 |
| Cypress Mill, TX | 78636 | 830 |
| 78663 | 830 | |
| Hye, TX | 78635 | 830 |
| Johnson City, TX | 78636 | 830 |
| Round Mountain, TX | 78663 | 830 |