| Locality | Postal Code |
|---|---|
| Postal/ZIP Codes in Alpha, Iron | 49902 |
| Postal/ZIP Codes in Amasa, Iron | 49903 |
| Postal/ZIP Codes in Beechwood, Iron | 49935 |
| Postal/ZIP Codes in Caspian, Iron | 49915 |
| Postal/ZIP Codes in Crystal Falls, Iron | 49920 |
| Postal/ZIP Codes in Gaastra, Iron | 49927 |
| Postal/ZIP Codes in Iron River, Iron | 49935 |
| Postal/ZIP Codes in Stambaugh, Iron | 49964 |