Interstate 41
| I-41 highlighted in red | |||||||
| Route information | |||||||
| Maintained by WisDOT and IDOT | |||||||
| Length | 175.00 mi (281.64 km) | ||||||
| Existed | April 7, 2015–present | ||||||
| History | Approved for designation in 2012 | ||||||
| NHS | Entire route | ||||||
| Major junctions | |||||||
| South end | I-94 Toll / US 41 in Russell, IL | ||||||
| 
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| North end | I-43 / US 41 / US 141 in Howard, WI | ||||||
| Location | |||||||
| Country | United States | ||||||
| States | Illinois, Wisconsin | ||||||
| Counties | IL: Lake WI: Kenosha, Racine, Milwaukee, Waukesha, Washington, Dodge, Fond du Lac, Winnebago, Outagamie, Brown | ||||||
| Highway system | |||||||
| 
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Interstate 41 (I-41) is a 175.00-mile-long (281.64 km) north–south Interstate Highway connecting the interchange of I-94 and U.S. Route 41 (US 41), located about a mile (1.6 km) south of the Wisconsin–Illinois border at the end of the Tri-State Tollway in metropolitan Chicago, to an interchange with I-43 in metropolitan Green Bay, Wisconsin. The designation travels concurrently with US 41 for its entire length, as well as portions of I-894, US 45, I-43, and sections of I-94 in Wisconsin and Illinois. The route was officially added to the Interstate Highway System on April 7, 2015, and connects Milwaukee and Green Bay with the Fox Cities.