Founded in 1907, Jackson County is one of 77 counties in the state of Oklahoma. Historically, Jackson County was formed from Greer County. The city of Altus is the county seat. With FIPS code of 65, Jackson County has a population of 24,777 and area of 803 square miles (2,080 km2).
List of all cities in Jackson County, OK alphabetically
| City/Town | Postal Code | Area Code |
| Altus, OK | 73521 | 580 |
| 73522 | 580 | |
| 73523 | 580 | |
| Altus AFB, OK | 73523 | 580 |
| Blair, OK | 73526 | 580 |
| Duke, OK | 73532 | 580 |
| Eldorado, OK | 73537 | 580 |
| Elmer, OK | 73539 | 580 |
| Headrick, OK | 73549 | 580 |
| Martha, OK | 73556 | 580 |
| Olustee, OK | 73560 | 580 |