Richland County is in Southern Illinois. Of the 102 counties in the Inland Empire, 231,639-acre Richland County ranks 83rd by size. Recent Land Network data shows approximately 1,000 acres of residential land and property for sale in Illinois's Richland County, which is valued at a combined $5 million. The average price of residential acreage for sale in Richland County was $729,814. 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.