There was a combined approximately $51 million of land for sale in Columbia County recently on Land.com. The total acreage of all Columbia County farms and rural real estate for sale was nearly 1,000 acres. Columbia County ranks 47th 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 Columbia County, Portage had the most land for sale. Manufacturing and related services are the largest economic sectors in Columbia County. Columbia County is Wisconsin's 41st biggest county (795 square miles). It's located in the Southwest Wisconsin region of Wisconsin.