Founded in 1910, Pennington County is one of 87 counties in the state of Minnesota. Historically, Pennington County was formed from Red Lake County. The city of Thief River Falls is the county seat. With FIPS code of 113, Pennington County has a population of 13,780 and area of 616.54 square miles (1,597 km2).
List of all cities in Pennington County, MN alphabetically
| City/Town | Postal Code | Area Code |
| Erie, MN | 56725 | 218 |
| Goodridge, MN | 56725 | 218 |
| Rosewood, MN | 56701 | 218 |
| Saint Hilaire, MN | 56754 | 218 |
| Thief River Falls, MN | 56701 | 218 |