Founded in 1862, Charles Mix County is one of 66 counties in the state of South Dakota. Historically, Charles Mix County was formed from unorganized territory. The city of Lake Andes is the county seat. With FIPS code of 23, Charles Mix County has a population of 9,163 and area of 1,098 square miles (2,844 km2).
List of all cities in Charles Mix County, SD alphabetically
| City/Town | Postal Code | Area Code |
| Academy, SD | 57369 | 605 |
| Bovee, SD | 57342 | 605 |
| Dante, SD | 57329 | 605 |
| Eagle, SD | 57369 | 605 |
| Geddes, SD | 57342 | 605 |
| Greenwood, SD | 57380 | 605 |
| Lake Andes, SD | 57356 | 605 |
| Marty, SD | 57361 | 605 |
| Pickstown, SD | 57367 | 605 |
| Platte, SD | 57369 | 605 |
| Ravinia, SD | 57356 | 605 |
| Wagner, SD | 57361 | 605 |
| 57380 | 605 |