The value of all land and rural real estate for sale in Minnesota's Mahnomen County recently was around $1 million, representing a combined 31 acres of land for sale in Mahnomen County. Mahnomen County ranks 81st out of 87 counties in the North Star State for the total number of acres of land currently advertised for sale. Of all locations in Mahnomen County with land for sale, Waubun had the most land for sale. Mahnomen County is Minnesota's 59th biggest county (582 square miles). It's located in the North Central West Minnesota region of Minnesota.