A total of approximately 2,000 acres were listed for sale in Pennington County, Minnesota, recently; the value of all Pennington County farmsand rural real estate for sale was approximately $5 million. Pennington County ranks 81st out of 87 counties in Minnesota for the total number of acres of land currently advertised for sale. Of all land and rural real estate for sale in Pennington County, Thief River Falls had the most land for sale. Pennington County is Minnesota's 52nd biggest county (618 square miles). It's located in the North Central West Minnesota region of Minnesota.