Henry County is in Western Illinois. Of the 102 counties in the state, Henry County ranks 16th in terms of size (825 square miles). Recent listings of residential land for sale in Illinois's Henry County totals almost 1,000 acres and a combined market value of approximately $3 million. The most common type of land for sale by combined acreage in Henry County is farms. The average price of residential land for sale in Henry County was $516,234. 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.