Of 102 counties in the state, Madison County is 20th in terms of its size (740 square miles). Madison County is in Southwest Illinois. Madison County, Illinois, includes around 1,000 acres of ranches for sale based on recent Land Network data. The combined market value of farms and rural land for sale here was almost $3 million. Browse all Madison County ranches for sale on the Land Network to find the ranch that's right for your business or commercial needs, from the sprawling legacy ranch to unbelievable residential ranch for your second home, investment property or retirement nest egg. The most common type of land for sale by combined acreage in Madison County is residential property.