Hamilton County is in Southern Illinois. Of the 102 counties in the state, 278,949-acre Hamilton County ranks 68th by size. There is nearly 1,000 acres of residential land for sale in Hamilton County, Illinois, based on recent Land Network data. The combined market value of land and rural real estate for sale here is roughly $900,000. The average price of residential land for sale in Hamilton County was $295,966. The economy here is mainly agricultural. 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.