Wisconsin Highway 31

State Trunk Highway 31
Green Bay Road Ole Davidson Road
Route information
Maintained by WisDOT
Length:	22.86 mi (36.79 km)
Major junctions
South end:	IL 131/Lake CR A1/19 in Pleasant Prairie
	WIS 165 near Pleasant Prairie WIS 50 near Pleasant Prairie WIS 158 near Kenosha WIS 11 near Mount Pleasant WIS 20 near Racine WIS 38 near Caledonia
North end:	WIS 32 near Racine
Highway system
Wisconsin Highways Interstates • U.S. • State County • Bannered • Rustic ← WIS 30 WIS 32 →

State Trunk Highway 31 (often called Highway 31, STH 31 or WIS 31) is a state highway in the U.S. state of Wisconsin. It runs north–south as a suburban route passing Racine and Kenosha. With the exception of a two mile (3 km) stretch between Four Mile Road and Wisconsin Highway 32 at the north end, WIS 31 is a multi-lane urban highway. An expansion of the remaining two miles was proposed by the Wisconsin Department of Transportation.

Route description

WIS 31 begins at the Illinois state line where it connects to ILL 131, following Green Bay Road to its junction through Pleasant Prairie. The highway briefly passes through the northwestern part of Kenosha. WIS 50 and WIS 158 cross WIS 31 in Kenosha. WIS 31 passes along the west side of University of Wisconsin–Parkside one mile (1.6 km) south of the Racine County line. In the Racine area, WIS 31 crosses WIS 11, WIS 20 and WIS 38, turning onto Ole Davidson Road in Caledonia. Green Bay Road, named after the historic route connecting Chicago with Milwaukee and Green Bay, has been upgraded to four-lane divided highway for the entire length. Ole Davidson Road has been upgraded to a divided highway from the split with North Green Bay Road to Four Mile Road.

Major intersections

County	Location	Mile	Destinations	Notes
Kenosha	Pleasant Prairie		WIS 165
	Kenosha		WIS 50
			WIS 158
	Somers		CTH-E
Racine	Sturtevant		WIS 11
	Mount Pleasant		WIS 20
			CTH-C
			WIS 38
	Caledonia		WIS 32
1.000 mi = 1.609 km; 1.000 km = 0.621 mi