Wisconsin Highway 81

State Trunk Highway 81
Route information
Maintained by WisDOT
Length	123.81 mi (199.25 km)
Major junctions
West end	WIS 133 in Cassville
Major intersections	US 61 / WIS 35 in Lancaster US 151 in Platteville US 51 in Beloit
East end	I-39 / I-43 / I-90 in Beloit
Location
Country	United States
State	Wisconsin
Counties	Grant, Lafayette, Green, Rock
Highway system
Wisconsin State Trunk Highway System Interstate US State Scenic Rustic
← WIS 80 → WIS 82

State Trunk Highway 81 (often called Highway 81, STH 81 or WIS 81) is a state highway in the U.S. state of Wisconsin. It runs east–west in southwest and south central Wisconsin from Beloit to Cassville. Between Brodhead and Monroe it shares it route with WIS 11 for 13 miles (21 km).

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  Junction At Brodhead with WIS 11 a County GG