Of 102 counties in the state, Lake County ranks second in terms of size (1,368 square miles). Lake County is in Chicagoland Illinois. There is almost 1,000 acres of ranches for sale in Lake County, Illinois, based on recent Land Network data. The combined market value of farmsand rural real estate for sale here is about $2 million. Browse all Lake County ranches for sale on the Land Network to find the ranch that's right for your business or commercial needs, from the sprawling legacy ranch to unbelievable residential ranch for your second home, investment property or retirement nest egg. The most common type of land for sale by combined acreage in Lake County is house.