Land for sale in Mahnomen County recently totaled nearly $2 million and around 1,000 acres. Mahnomen County ranks 81st in the North Star State for the total number of acres of land currently advertised for sale. Among cities in Mahnomen County with farms, hunting land and other rural land and acreage for sale, Waubun had the most land for sale. Mahnomen County is Minnesota's 59th largest county (582 square miles). It's located in the North Central West Minnesota region of Minnesota.