The combined value of farmsand rural real estate for sale in Douglas County, Illinois, recently on Land.com was $4 million. This represents approximately 1,000 acres of land for sale in Douglas County. Douglas County ranks 65th in the state for the combined amount of land currently advertised for sale. Of all farms, hunting land and other rural land and acreage for sale in Douglas County, Camargo featured the most land for sale. Manufacturing and related services are the largest economic sectors in Douglas County. Douglas County is the 72nd biggest county (417 square miles) in Illinois. It's located in the Central Illinois region of Illinois.