Founded in 1876, Donley County is one of 254 counties in the state of Texas. Historically, Donley County was formed from Bexar County. The city of Clarendon is the county seat. With FIPS code of 129, Donley County has a population of 3,268 and area of 930 square miles (2,409 km2).
List of all cities in Donley County, TX alphabetically
| City/Town | Postal Code | Area Code |
| Clarendon, TX | 79226 | 806 |
| Hedley, TX | 79237 | 806 |
| Howardwick, TX | 79226 | 806 |
| Lelia Lake, TX | 79240 | 806 |