| Locality | Post Code |
|---|---|
| Burr Oak, Saint Joseph | 49030 |
| Centreville, Saint Joseph | 49032 |
| Colon, Saint Joseph | 49040 |
| Constantine, Saint Joseph | 49042 |
| Fulton, Saint Joseph | 49052 |
| Leonidas, Saint Joseph | 49066 |
| Marcellus, Saint Joseph | 49067 |
| Mendon, Saint Joseph | 49072 |
| Mottville, Saint Joseph | 49099 |
| Nottawa, Saint Joseph | 49075 |
| Sturgis, Saint Joseph | 49091 |
| Three Rivers, Saint Joseph | 49093 |
| White Pigeon, Saint Joseph | 49099 |