Dorsey, Madison County, Illinois Land for Sale. Looking for rural homes and land for sale in Dorsey, Madison County, Illinois? LandWatch.com has thousands of rural properties in Dorsey, Madison County, Illinois, including hunting & fishing properties, cabins, Land for sale and land auctions. Choose from small acreage lots to massive 500+ acre estates. You can also find Dorsey, Madison County, Illinois real estate agents who specialize in land and rural retreats. Sign up for our Dorsey, Madison County, Illinois email alerts and never miss out on a new listing again!