| Locality | Post Code |
|---|---|
| Elliott, Montgomery | 51532 |
| Emerson, Montgomery | 51533 |
| Grant, Montgomery | 50847 |
| Henderson, Montgomery | 51541 |
| Morton Mills, Montgomery | 50864 |
| Red Oak, Montgomery | 51566 |
| Stanton, Montgomery | 51573 |
| Tenville Junction, Montgomery | 50864 |
| Villisca, Montgomery | 50864 |