| Locality | Post Code |
|---|---|
| Academy, Charles Mix | 57369 |
| Bovee, Charles Mix | 57342 |
| Dante, Charles Mix | 57329 |
| Eagle, Charles Mix | 57369 |
| Geddes, Charles Mix | 57342 |
| Greenwood, Charles Mix | 57380 |
| Lake Andes, Charles Mix | 57356 |
| Marty, Charles Mix | 57361 |
| Pickstown, Charles Mix | 57367 |
| Platte, Charles Mix | 57369 |
| Ravinia, Charles Mix | 57356 |
| Wagner, Charles Mix | 57380 |