Post Offices List in Pennington County, Minnesota:
| Saint Hilaire Post Office | 302 N Broadway, Saint Hilaire, MN 56754 |
| Thief River Falls Post Office | 121 Labree Ave N, Thief River Falls, MN 56701 |
| Goodridge Post Office | 204 Vaughn Main St E, Goodridge, MN 56725 |