There was a total of almost $5 million of land and rural real estate for sale in Winnebago County recently on Land.com. The total of all Winnebago County farms, ranches, hunting land and other land for sale was around 1,000 acres. Winnebago County ranks 92nd out of 99 counties in Iowa for the total acreage of land currently advertised for sale. Of all farms and ranches for sale in Winnebago County, Lake Mills featured the most land for sale. Winnebago County is Iowa's 98th largest county (401 square miles). It's located in the Central Iowa region of Iowa.