Founded in 1856, Jack County is one of 254 counties in the state of Texas. Historically, Jack County was formed from Cooke County. The city of Jacksboro is the county seat. With FIPS code of 237, Jack County has a population of 8,712 and area of 917 square miles (2,375 km2).
List of all cities in Jack County, TX alphabetically
| City/Town | Postal Code | Area Code |
| Bridgeport, TX | 76458 | 940 |
| Bryson, TX | 76427 | 940 |
| Jacksboro, TX | 76458 | 940 |
| Jermyn, TX | 76459 | 940 |
| Perrin, TX | 76486 | 940 |
| Runaway Bay, TX | 76458 | 940 |