Wisconsin Highway 42

State Trunk Highway 42
WIS 42; mainline in red, business route in blue
Route information
Maintained by WisDOT
Length	135 mi[1] (217 km)
Tourist routes	Lake Michigan Circle Tour
Major junctions
South end	WIS 23 / WIS 28 in Sheboygan
Major intersections	I-43 near Sheboygan WIS 32 in Howards Grove US 151 in Manitowoc I-43 / US 151 in Manitowoc US 10 in Manitowoc WIS 57 around Sturgeon Bay
North end	Washington Island Ferry Dock in Northport
Location
Country	United States
State	Wisconsin
Counties	Sheboygan, Manitowoc, Kewaunee, Door
Highway system
Wisconsin State Trunk Highway System Interstate US State Scenic Rustic
← WIS 41 → I-43

State Trunk Highway 42 (often called Highway 42, STH-42 or WIS 42) is a state highway in the U.S. state of Wisconsin. It runs for 135 miles (217 km) north–south in northeast Wisconsin from Sheboygan to the ferry dock in Northport. Much of the highway is part of the Lake Michigan Circle Tour from the eastern junction with U.S. Highway 10 (US 10) in Manitowoc to its junction with WIS 57 in Sister Bay. WIS 42 parallels I-43 from Sheboygan to Manitowoc, and parallels WIS 57 throughout much of the route, particularly from Manitowoc to Sturgeon Bay, meeting the northern terminus of WIS 57 in Sister Bay.