| Locality | Post Code |
|---|---|
| Bakerville, Custer | 57730 |
| Bluebell, Custer | 57730 |
| Buffalo Gap, Custer | 57722 |
| Crazy Horse, Custer | 57730 |
| Custer, Custer | 57730 |
| Dewey, Custer | 57735 |
| Fairburn, Custer | 57738 |
| Fleming, Custer | 57738 |
| Folsom, Custer | 57744 |
| Game Lodge, Custer | 57730 |
| Harney Peak, Custer | 57730 |
| Hayward, Custer | 57744 |
| Hermosa, Custer | 57744 |
| Pringle, Custer | 57773 |
| Red Shirt, Custer | 57744 |
| Sanator, Custer | 57730 |
| Sylvan Lake, Custer | 57730 |