Interstate 90 in Illinois

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Interstate 90
I-90 highlighted in red
Route information
Maintained by ISTHA, IDOT, and SCC
Length	123.89 mi[1] (199.38 km)
NHS	Entire route
Major junctions
West end	I-39 / I-90 at Wisconsin state line
Major intersections	I-39 / US 51 in Cherry Valley I-290 / IL 53 in Rolling Meadows Future I-490 in Des Plaines I-294 Toll in Rosemont I-190 in Chicago I-94 in Chicago I-290 / IL 110 (CKC) in Chicago I-55 in Chicago I-94 / Chicago Skyway in Chicago
East end	I-90 Toll / Indiana Toll Road at Indiana state line
Location
Country	United States
State	Illinois
Counties	Winnebago, Boone, McHenry, Kane, Cook
Highway system
Interstate Highway System Main Auxiliary Suffixed Business Future Illinois State Highway System Interstate US State Tollways Scenic
← IL 89 → IL 90

Interstate 90 (I-90) in the US state of Illinois runs roughly northwest-to-southeast through the northern part of the state. From the Wisconsin state line at South Beloit, it heads south to Rockford before heading east-southeast to the Indiana state line at Chicago. I-90 traverses 124 miles (200 km) through a variety of settings, from farmland west of the Fox River Valley through the medium-density suburbs west of O'Hare International Airport, through Downtown Chicago, and through the heart of the industrial southeast side of Chicago before entering Indiana.

I-90 comprises several named highways. The Interstate runs along the Jane Addams Memorial Tollway (previously called the Northwest Tollway) from South Beloit to O'Hare Airport, the Kennedy Expressway from O'Hare to the Chicago Loop, the Dan Ryan Expressway from the Loop to the Chicago Skyway, and the Skyway to the Indiana state line. The Jane Addams and Chicago Skyway are toll roads maintained by the Illinois State Toll Highway Authority (ISTHA) and the Skyway Concession Company (SCC), respectively. The remainder of the highway is maintained by the Illinois Department of Transportation (IDOT).