| Locality | Post Code |
|---|---|
| Algernon, Custer | 68855 |
| Anselmo, Custer | 68813 |
| Ansley, Custer | 68814 |
| Arnold, Custer | 69120 |
| Berwyn, Custer | 68814 |
| Broken Bow, Custer | 68822 |
| Callaway, Custer | 68825 |
| Cliff, Custer | 69120 |
| Comstock, Custer | 68828 |
| Corner, Custer | 68874 |
| Custer, Custer | 68825 |
| Delight, Custer | 68825 |
| Douglas Grove, Custer | 68828 |
| East Custer, Custer | 68860 |
| Elim, Custer | 68825 |
| Geranium, Custer | 68828 |
| Kilfoil, Custer | 68856 |
| Mason City, Custer | 68855 |
| Merna, Custer | 68856 |
| Milburn, Custer | 68813 |
| Myrtle, Custer | 68814 |
| New Helena, Custer | 68813 |
| Oconto, Custer | 68860 |
| Ryno, Custer | 68825 |
| Sargent, Custer | 68874 |
| Spring Creek, Custer | 68881 |