Saline County is in Southern Illinois. Of the 102 counties in the Prairie State, Saline County is 77th in terms of its size (386 square miles). Saline County, Illinois, has roughly 1,000 acres of residential land for sale based on recent Land Network data. The combined market value of land and rural real estate for sale here was roughly $2 million. The average price of residential acreage for sale in Saline County was $128,682. Browse all residential land and rural property for sale in Illinois to find residential land and properties that suit your lifestyle needs, from existing residential homes and estates to land ready for future residential-property development.