Located in Central Illinois, 1,119-square-mile Iroquois County is one of the ten biggest counties in the Land of Lincoln. Recent listings of residential land and property for sale in Iroquois County, Illinois, totals roughly 1,000 acres and a combined market value of approximately $10 million. The most common type of land for sale by combined acreage in Iroquois County is residential property. The average price of residential acreage for sale in Iroquois County was $466,561. 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.