Town Hall Address W1095 Concord Center Drive Sullivan, WI 53178 United States- Jefferson County Website http://www.concordwisconsin.org/ Zoning 262-490-0513 N7884 Dead End Road Ixonia, WI 53036 United States Town Clerk (414) 534-4220 N6830 County Rd E Oconomowoc, WI 53066 United States Tax Collector (262) 593-8696 N6816 County Rd E Oconomowoc, WI 53066 United States County Jefferson