Of 102 counties in the Land of Lincoln, Winnebago County ranks 52nd by size (519 square miles). Winnebago County is in Northern Illinois. The total value of almost 1,000 acres of lakefront homes and property recently listed for sale in Winnebago County, Illinois, was approximately $2 million. Browse all waterfront property for sale in Winnebago County on the Land Network to find the marina, lakefront and other recreational property that meets your needs, from waterside land perfect as a retirement investment to existing residential waterfront land and property for hunting, fishing and other outdoor-recreation pursuits! The most common type of land for sale by combined acreage in Winnebago County is residential property.