I-43

About I-43

From Beloit, WI (I-39/I-90) to Green Bay, WI (I-41)

Interstate 43 is a north-south route entirely within Wisconsin, running about 192 miles from Beloit at the Illinois state line north through Milwaukee and along the Lake Michigan shore to Green Bay. The southern portion connects Beloit and Janesville with the Milwaukee metropolitan area, while the northern portion follows the lakeshore through Sheboygan and Manitowoc. The route ties together the southeastern corner of the state with the eastern Lake Michigan coast.

Through Milwaukee the route passes near the downtown area and crosses the major freeway interchanges of the city, including connections to I-94 and I-794. North of Milwaukee it hugs the Lake Michigan shoreline, serving smaller industrial and port cities before reaching Green Bay, where it ends at I-41. The corridor combines metropolitan commuter traffic in the Milwaukee area with longer-distance travel along the coast.

State-by-state mileage

State	Miles
Wisconsin	191.6
Total	191.6

History

Interstate 43 was designated in 1962 and built out over the following decades as Wisconsin completed its Interstate network. It was assembled from freeway segments connecting Beloit, Milwaukee, and the lakeshore cities to Green Bay.

Major cities and places

Notable features

• Lake Michigan shoreline

Did you know

• Located entirely within Wisconsin.
• Designated in 1962 and completed in stages over later decades.
• Follows the Lake Michigan shore between Milwaukee and Green Bay.
• Shares its Green Bay terminus area with I-41.