A combined nearly 2,000 acres were listed for sale in Illinois's Kendall County recently; the value of all Kendall County farms, rural land, hunting land and other land for sale was $127 million. Kendall County ranks 17th in the Land of Lincoln for the combined amount of land currently advertised for sale. Of all locations in Kendall County with land and rural real estate for sale, Oswego had the most land for sale. Kendall County is the 89th largest county (322 square miles) in Illinois. It's located in the Northern Illinois region of Illinois.