Founded in 1907, Johnston County is one of 77 counties in the state of Oklahoma. Historically, Johnston County was formed from Chickasaw Nation land. The city of Tishomingo is the county seat. With FIPS code of 69, Johnston County has a population of 10,301 and area of 645 square miles (1,671 km2).
List of all cities in Johnston County, OK alphabetically
| City/Town | Postal Code | Area Code |
| Bromide, OK | 74530 | 580 |
| Coleman, OK | 73432 | 580 |
| Connerville, OK | 74836 | 580 |
| Kenefic, OK | 74748 | 580 |
| Mannsville, OK | 73447 | 580 |
| Milburn, OK | 73450 | 580 |
| Mill Creek, OK | 74856 | 580 |
| Ravia, OK | 73455 | 580 |
| Tishomingo, OK | 73460 | 580 |
| Wapanucka, OK | 73461 | 580 |