Founded in 1909, Harding County is one of 66 counties in the state of South Dakota. Historically, Harding County was formed from unorganized territory. The city of Buffalo is the county seat. With FIPS code of 63, Harding County has a population of 1,327 and area of 2,671 square miles (6,918 km2).
List of all cities in Harding County, SD alphabetically
| City/Town | Postal Code | Area Code |
| Buffalo, SD | 57720 | 605 |
| Camp Crook, SD | 57724 | 605 |
| Gustave, SD | 57724 | 605 |
| Ludlow, SD | 57755 | 605 |
| Olson, SD | 57755 | 605 |
| Ralph, SD | 57650 | 605 |
| Redig, SD | 57776 | 605 |
| Reva, SD | 57651 | 605 |
| Sky Ranch, SD | 57724 | 605 |
| Wilson Corner, SD | 57755 | 605 |