List of Interstate Highways in Wisconsin

Interstate Highways of the Wisconsin State Trunk Highway System
Highway marker for Interstate 94 and Interstate 894
Interstate Highways highlighted in red
System information
Length	1,099.11 mi (1,768.85 km)
Formed	June 29, 1956 (1956-06-29)
Highway names
Interstates	Interstate nn (I-nn)
System links
Wisconsin State Trunk Highway System Interstate US State Scenic Rustic

The Interstate Highways in Wisconsin comprise five current primary Interstate Highways and three auxiliary Interstates.

Primary Interstate Highways


Number	Length (mi)	Length (km)	Southern or western terminus	Northern or eastern terminus	Formed	Removed	Notes
I-39	182.14	293.13	I-39/I-90 near Beloit	US 51/WIS 29 in Rothschild	01992-01-011992	current
I-41	175.43	282.33	I-94/I-41/US 41 near Russell, IL	I-43 and US 41/US 141 in Howard	02015-04-092015	current	Overlaps US 41 in the state
I-43	191.55	308.27	I-39/I-90 and WIS 81 in Beloit	US 41/US 141 in Howard	01981-01-011981	current
I-90	187.13	301.16	I-90 in La Crosse	I-39/I-90 in Beloit	01956-01-011956	current
I-94	348.23	560.42	I-94/US 12 in Hudson	I-94/I-41/US 41 near Russell, IL	01956-01-011956	current


Number	Length (mi)	Length (km)	Southern or western terminus	Northern or eastern terminus	Formed	Removed	Notes
I-535	1.21	1.95	US 53 and WIS 35 in Superior	I-535/US 53 at Duluth, MN	01971-01-011971	current	Follows the John A. Blatnik Bridge and continues another 1.57 miles (2.53 km) to I-35 in Duluth
I-794	3.50	5.63	I-43/I-94/US 41 in Milwaukee	WIS 794 in Milwaukee	01980-01-011980	current	Called the Lake Freeway and the East–West Freeway
I-894	9.92	15.96	I-94 and US 45 in West Allis	I-43/I-94 in Milwaukee	01966-01-011966	current	Completely concurrent with I-41, part concurrent with I-43 called the Airport Freeway.

McNichol, Dan (2006). The Roads that Built America. New York: Sterling. p. 106. ISBN 1-4027-3468-9. OCLC 63377558.
^ Wisconsin State Trunk Highway Logs:
- Northeast Region Staff (May 14, 2009). State Trunk Highway Log for Region 3. Green Bay, WI: Wisconsin Department of Transportation.
- Northwest Region Staff (May 14, 2009). State Trunk Highway Log for Region 5. Eau Claire, WI: Wisconsin Department of Transportation.
- North Central Region Staff (December 31, 2008). State Trunk Highway Log for North Central Region (XLS). Rhinelander, WI: Wisconsin Department of Transportation.
- Southwest Region Staff (December 31, 2008). State Trunk Highway Log for Southwest Region (XLS). Madison, WI: Wisconsin Department of Transportation.
- Southeast Region Staff (December 31, 2008). State Trunk Highway Log for Southeast Region (XLS). Waukesha, WI: Wisconsin Department of Transportation.
Srubas, Paul (April 9, 2015). "US 41 Named Officially to Interstate Highway System". Green Bay Press Gazette.