| Locality | Postal Code |
|---|---|
| Postal/ZIP Codes in Butte, Silver Bow | 59701, 59750 |
| Postal/ZIP Codes in Divide, Silver Bow | 59727 |
| Postal/ZIP Codes in Melrose, Silver Bow | 59743 |
| Postal/ZIP Codes in Ramsay, Silver Bow | 59748 |
| Postal/ZIP Codes in Rocker, Silver Bow | 59701 |
| Postal/ZIP Codes in Silverbow, Silver Bow | 59750 |
| Postal/ZIP Codes in Walkerville, Silver Bow | 59701 |