Land for sale in Iowa's Winnebago County recently totaled approximately $5 million and around 1,000 acres. Winnebago County ranks 92nd in Iowa for the total number of acres of land currently advertised for sale. Of all locations in Winnebago County with land and rural real estate for sale, Forest City had the most land for sale. Winnebago County is Iowa's 98th biggest county (401 square miles). It's located in the Central Iowa region of Iowa.