| Locality | Post Code |
|---|---|
| Albion, Marshall | 50005 |
| Beaman, Marshall | 50609 |
| Clemons, Marshall | 50051 |
| Conrad, Marshall | 50621 |
| Ferguson, Marshall | 50078 |
| Gilman, Marshall | 50106 |
| Green Mountain, Marshall | 50632 |
| Harvester, Marshall | 50234 |
| Haverhill, Marshall | 50120 |
| Laurel, Marshall | 50141 |
| Le Grand, Marshall | 50142 |
| Liscomb, Marshall | 50148 |
| Marshalltown, Marshall | 50158 |
| Melbourne, Marshall | 50162 |
| Minerva, Marshall | 50005 |
| Rhodes, Marshall | 50234 |
| Saint Anthony, Marshall | 50239 |
| State Center, Marshall | 50247 |
| Union, Marshall | 50258 |
| Van Cleve, Marshall | 50162 |