Interstate 180 (Illinois)

I-180
Route information
Auxiliary route of I-80
Length	13.19 mi[1] (21.23 km)
Existed	1967–present
History	Completed in 1969
NHS	Entire route
Major junctions
South end	IL 26 / IL 71 in Hennepin
Major intersections	US 6 in Princeton
North end	I-80 in Princeton
Location
Country	United States
State	Illinois
Counties	Putnam, Bureau
Highway system
Interstate Highway System Main Auxiliary Suffixed Business Future Illinois State Highway System Interstate US State Tollways
← IL 179 IL 180 →

Interstate 180 (I-180) is a north–south highway in the U.S. state of Illinois that goes from Princeton to Hennepin. The highway is 13.19 miles (21.23 km) long.^[1]

I-180 is one of the least traveled Interstates in the country. The highway serves 1,950–3,600 vehicles per day as of 2013^[update].^[2]

1. ↑ ^{1.0 1.1} "Table 2: Auxiliary Routes of the Dwight D. Eisenhower National System Of Interstate and Defense Highways". FHWA Route Log and Finder List. Federal Highway Administration. December 31, 2021.
2. ↑ Illinois Department of Transportation (2013). "T2 GIS Data". Archived from the original on March 2, 2016.