| Locality | Post Code |
|---|---|
| Fort Peck, Valley | 59223 |
| Frazer, Valley | 59225 |
| Glasgow, Valley | 59230 |
| Glentana, Valley | 59240 |
| Hinsdale, Valley | 59241 |
| Larslan, Valley | 59244 |
| Lustre, Valley | 59225 |
| Nashua, Valley | 59248 |
| Opheim, Valley | 59250 |
| Richland, Valley | 59260 |
| Saint Marie, Valley | 59230 |
| Tampico, Valley | 59230 |
| Vandalia, Valley | 59273 |