Founded in 1907, Jefferson County is one of 77 counties in the state of Oklahoma. Historically, Jefferson County was formed from Comanche County and part of Chickasaw Nation. The city of Waurika is the county seat. With FIPS code of 67, Jefferson County has a population of 5,438 and area of 759 square miles (1,966 km2).
List of all cities in Jefferson County, OK alphabetically
| City/Town | Postal Code | Area Code |
| Addington, OK | 73520 | 580 |
| Grady, OK | 73569 | 580 |
| Hastings, OK | 73548 | 580 |
| Oscar, OK | 73561 | 580 |
| Ringling, OK | 73456 | 580 |
| Ryan, OK | 73565 | 580 |
| Terral, OK | 73561 | 580 |
| 73569 | 580 | |
| Waurika, OK | 73573 | 580 |