| Locality | Post Code |
|---|---|
| Aitkin, Aitkin | 56431 |
| Balsam, Aitkin | 55787 |
| Clark, Aitkin | 55787 |
| East Lake, Aitkin | 55760 |
| Haugen, Aitkin | 55787 |
| Haypoint, Aitkin | 55748 |
| Hill City, Aitkin | 55748 |
| Jacobson, Aitkin | 55752 |
| Jevne, Aitkin | 55760 |
| Lawler, Aitkin | 55760 |
| Libby, Aitkin | 56469 |
| Logan, Aitkin | 56469 |
| McGrath, Aitkin | 56350 |
| McGregor, Aitkin | 55760 |
| Minnewana, Aitkin | 55760 |
| Morrison, Aitkin | 56469 |
| Palisade, Aitkin | 56469 |
| Rice River, Aitkin | 55760 |
| Salo, Aitkin | 55760 |
| Shamrock, Aitkin | 55760 |
| Sheshebee, Aitkin | 55760 |
| Spalding, Aitkin | 55760 |
| Swatara, Aitkin | 55785 |
| Tamarack, Aitkin | 55787 |
| Turner, Aitkin | 55760 |
| Verdon, Aitkin | 56469 |