Land for sale in Fond du Lac County, Wisconsin, recently totaled nearly $69 million and almost 2,000 acres. Fond du Lac County ranks 12th out of 72 counties in the Badger State for the total number of acres of land currently advertised for sale. Of all farms, hunting land and other rural land and acreage for sale in Fond du Lac County, Fond Du Lac had the most land for sale. Manufacturing and related services are the largest economic sectors in Fond du Lac County. Fond du Lac County is Wisconsin's 44th biggest county (765 square miles). It's located in the Northeast Wisconsin region of the state.