A combined approximately 2,000 acres were listed for sale in Minnesota's Pennington County recently; the value of all Pennington County farms, rural land, hunting land and other land for sale was approximately $5 million. Pennington County ranks 81st out of 87 counties in the Land of 10,000 Lakes for the total acreage of land currently advertised for sale. Thief River Falls had the most land for sale. Pennington County is the 52nd largest county (618 square miles) in Minnesota. It's located in the North Central West Minnesota region of Minnesota.