Land for sale in Jefferson County recently totaled $18 million and 1,000 acres. Jefferson County ranks 65th in the Badger State for the total acreage of land currently advertised for sale. Of all farms, hunting land and other rural land and acreage for sale in Jefferson County, Fort Atkinson featured the most land for sale. From an economic perspective, manufacturing and related services are the main sectors in Jefferson County. Jefferson County is Wisconsin's 61st largest county (582 square miles). It's located in the Southwest Wisconsin region of the state.