| Locality | Post Code |
|---|---|
| Allegan, Allegan | 49010 |
| Bloomingdale, Allegan | 49026 |
| Bradley, Allegan | 49311 |
| Burnips, Allegan | 49314 |
| Caledonia, Allegan | 49316 |
| Dorr, Allegan | 49323 |
| Douglas, Allegan | 49406 |
| Fennville, Allegan | 49408 |
| Glenn, Allegan | 49416 |
| Gobles, Allegan | 49055 |
| Grand Junction, Allegan | 49056 |
| Hamilton, Allegan | 49419 |
| Hopkins, Allegan | 49328 |
| Martin, Allegan | 49070 |
| Moline, Allegan | 49335 |
| Otsego, Allegan | 49078 |
| Plainwell, Allegan | 49080 |
| Pullman, Allegan | 49450 |
| Saugatuck, Allegan | 49453 |
| Shelbyville, Allegan | 49344 |
| South Haven, Allegan | 49090 |
| Wayland, Allegan | 49348 |