Welcome to Thief River Falls!
Thief River Falls is in Minnesota. It offers a quiet relaxing location to get away from the big city life. Thief River Falls sometimes referred to as Thief River or abbreviated as TRF, is a city in Pennington County in the northwest portion of the U.S. state of Minnesota. The population was 8,573 at the 2010 census. Thief River Falls is the county seat for Pennington County.