Walworth County    Walworth County Government    City of Elkhorn    Elkhorn Chamber of Commerce    Village of Walworth    City of Whitewater    Whitewater Chamber of Commerce    Village of Darien    City of Delavan    Delavan Chamber of Commerce WSOR serves Walworth County directly from its Janesville, WI terminal. The rail line comes into Walworth County four different ways: from the north via Waukesha, from the northwest via Milton Junction, from the southwest via Janesville, and from the south via McHenry County, IL. Walworth County is located in extreme southeastern Wisconsin, just north of the Illinois border.