| Locality | Post Code |
|---|---|
| Adair, Audubon | 50002 |
| Audubon, Audubon | 50025 |
| Brayton, Audubon | 50042 |
| Coon Rapids, Audubon | 50058 |
| Elk Horn, Audubon | 51531 |
| Exira, Audubon | 50076 |
| Fiscus, Audubon | 50025 |
| Gray, Audubon | 50110 |
| Hamlin, Audubon | 50117 |
| Kimballton, Audubon | 51543 |
| Manning, Audubon | 51455 |
| Ross, Audubon | 50025 |
| Sharon, Audubon | 50025 |