Pennington County is a county located in the state of Minnesota. Based on the 2010 census, the population was 13,930. Its county seat is Thief River Falls. The county was formed on November 23, 1910, from sections of Red Lake County. It was named after Edmund Pennington, vice president of the Minneapolis, St. Paul and Sault Ste. Marie Railway.
Named for Edmund Pennington, president of the Minneapolis, St. Paul & Sault Ste. Marie Railway Company.
County QuickFacts: CensusBureau Quick Facts
The earliest known settlers in northwestern Minnesota were the Dakota Sioux who were well established by the late 1600's. By 1770 the Chippewa had become the dominant tribe in a wide area of northern and central Minnesota, including the area which later became Pennington County. In 1863 the Chippewa signed a treaty with the Federal Government which opened up a large tract of land to homesteaders, while reserving some of what would later become Pennington County as Chippewa land. When Polk County was formed in 1858, it included what would later be both Red Lake and Pennington Counties. In 1896 Red Lake County was formed from part of Polk County and in 1910 Pennington County was formed from part of Red Lake County. Thief River Falls is the county seat.
As reported by the Census Bureau, the county has a total area of 618 square miles (1,600 km2), of which 617 square miles (1,600 km2) is land and 1.7 square miles (4.4 km2) (0.3%) is water. Pennington is one of 17 Minnesota savanna region counties with more savanna soils than either prairie or forest soils.
Bordering counties are as follows: