The total value of farmsand rural real estate for sale in Washington County recently on Land.com was nearly $77 million. This represents approximately 1,000 acres of farms and rural land for sale in Washington County. Washington County ranks 29th out of 72 counties in Wisconsin for the total acreage of land currently advertised for sale. Of all farms, hunting land and other rural land and acreage for sale in Washington County, West Bend had the most land for sale. Manufacturing and related services are the largest economic sectors in Washington County. Washington County is Wisconsin's 68th biggest county (435 square miles). It's located in the Southeast Wisconsin region of the state.