Founded in 1909, Mellette County is one of 66 counties in the state of South Dakota. Historically, Mellette County was formed from Lyman County. The city of White River is the county seat. With FIPS code of 95, Mellette County has a population of 1,908 and area of 1,307 square miles (3,385 km2).
List of all cities in Mellette County, SD alphabetically
| City/Town | Postal Code | Area Code |
| Bad Nation, SD | 57585 | 605 |
| Blackpipe, SD | 57560 | 605 |
| Cedarbutte, SD | 57579 | 605 |
| Norris, SD | 57560 | 605 |
| Wanamaker, SD | 57560 | 605 |
| Westover, SD | 57579 | 605 |
| White River, SD | 57579 | 605 |
| Wood, SD | 57585 | 605 |