| Locality | Postal Code |
|---|---|
| Postal/ZIP Codes in Arlee, Lake | 59821 |
| Postal/ZIP Codes in Big Arm, Lake | 59910 |
| Postal/ZIP Codes in Charlo, Lake | 59824 |
| Postal/ZIP Codes in Dayton, Lake | 59914 |
| Postal/ZIP Codes in Elmo, Lake | 59915 |
| Postal/ZIP Codes in Moiese, Lake | 59824 |
| Postal/ZIP Codes in Pablo, Lake | 59855 |
| Postal/ZIP Codes in Polson, Lake | 59860 |
| Postal/ZIP Codes in Proctor, Lake | 59929 |
| Postal/ZIP Codes in Ravalli, Lake | 59863 |
| Postal/ZIP Codes in Rollins, Lake | 59931 |
| Postal/ZIP Codes in Ronan, Lake | 59864 |
| Postal/ZIP Codes in Saint Ignatius, Lake | 59865 |