Interstate 43


I-43 is a relatively short interstate located in Wisconsin, which connects Green Bay to Milwaukee and then Beloit on the Wisconsin - Illinois border.

It is completely confined within the borders of Wisconsin. It is mostly a north-south interstate, though the southern part from Milwaukee to Beloit runs diagonally across the lower part of the state in a northeastern - southwestern direction.

Driving Tip - The bridges and overpasses on this road can easily freeze over. Use extra caution when winter weather is near.

How long is I-43?

I-43 is the 29th shortest interstate in the United States, at approximately 192 miles of road.

Where does I-43 end?

Its southern end terminates just outside of Beloit on the northeast side, where it merges into I-90 and I-39. Its northern end terminates on the northern side of Green Bay, at the same junction where I-41 turns into Highway 41.

Map of I-43

Attractions and Things to Do near I-43

The upper half of I-43 runs right alongside Lake Michigan, and passes through some great small towns along the way. Some of these towns include Sheboygan and Port Washington (where the 90s sitcom Step By Step was set).

The lower half passes through some great places too, and even a spooky one! There have been a number of sightings of a supposed werewolf in Elkhorn, Wisconsin, a town that I-43 runs straight through. Be sure to take extra care if you find yourself passing through!

Below are a few attractions if you find yourself traveling this highway and are in search of some fun things to do:

  • Lighthouses of Door County*
    Door County, WI
  • Green Bay Packers Hall of Fame and Lambeau Field Atrium
    Green Bay, WI
  • Brett Favre Steakhouse
    Green Bay, WI
  • Bay Beach Amusement Park
    Green Bay, WI
  • National Railroad Museum
    Ashwaubenon, WI
  • Above and Beyond Children's Museum
    Sheboygan, WI
  • Milwaukee Public Museum
    Milwaukee, WI
  • Mitchell Park Horticultural Conservatory
    Milwaukee, WI
  • War Memorial Center and Lakefront Area
    Milwaukee, WI
  • Retzer Nature Center**
    Waukesha, WI
  • The Elegant Farmer
    Mukwonago, WI
  • Beckman Mill
    Beloit, WI

* North of I-43 on Highway on Hwy 57 *

** North of I-43 on Highway on Hwy 18 **

When was I-43 started and completed?

Construction of I-43 was started in the early to mid 1960s. The southern portion from Milwaukee to Beloit was completed in 1976, and the northern portion was completed in 1981, finalizing the route from Green Bay to Beloit.

States I-43 travels through

I-43 runs its course entirely within the state of Wisconsin. Would a suitable nickname be "The Dairy Interstate", or is that a little too simple?

  • Wisconsin

I-43 Major Cities

While I-43 only passes through one major metropolitan area, there are several smaller noteworthy communities along its route. Here they are from north to south:

  • Green Bay, Wisconsin
  • Sheboygan, Wisconsin
  • Port Washington, Wisconsin
  • Milwaukee, Wisconsin
  • Beloit, Wisconsin

Major Connections & Interchanges

While Interstate 43 provides rapid transportation to much of eastern and southeastern Wisconsin, travelers can also access much of western Wisconsin and neighboring states through the I-90 and I-94 interchanges in Milwaukee.

  • Green Bay, WI
    I-41 S to Appleton, WI
  • Milwaukee, WI
    I-41 N to Fond Du Lac, WI
    I-94 E to Chicago, IL
    I-94 W to Madison, WI
  • Beloit, WI
    I-90 W to Madison, WI
    I-90 E to Chicago, IL