U.S. Highway 8 (US 8) is a United States Numbered Highway that runs primarily east–west for , mostly within the state of Wisconsin. It connects Interstate 35 (I-35) in Forest Lake, Minnesota, to US 2 at Norway in the Upper Peninsula of Michigan near the border with Wisconsin. Except for the short freeway segment near Forest Lake, and sections near the St. Croix River bridge and Rhinelander, Wisconsin, it is mostly undivided surface road. As a state highway in the three states, US 8 is maintained by the Minnesota, Wisconsin and Michigan departments of transportation (MnDOT, WisDOT, MDOT, respectively).