Clark County is in Central Illinois. Of the 102 counties in the state, 504-square-mile Clark County ranks 54th by size. There is roughly 1,000 acres of residential land for sale in Illinois's Clark County based on recent Land Network data. The combined market value of farms, hunting land and other rural land and acreage for sale here is around $3 million. The average price of residential land for sale in Clark County was $395,286. 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.