| Locality | Post Code |
|---|---|
| Cassopolis, Cass | 49031 |
| Decatur, Cass | 49045 |
| Dowagiac, Cass | 49047 |
| Eau Claire, Cass | 49111 |
| Edwardsburg, Cass | 49112 |
| Jones, Cass | 49061 |
| Marcellus, Cass | 49067 |
| Niles, Cass | 49120 |
| Union, Cass | 49130 |
| Vandalia, Cass | 49095 |
| White Pigeon, Cass | 49099 |