Interstate 180 (Illinois)
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| Route information | ||||
| Maintained by IDOT | ||||
| Length: | 13.19 mi (21.23 km) | |||
| Existed: | 1967 – present | |||
| History: | Completed in 1969 | |||
| Major junctions | ||||
| South end: |
  IL 26 / IL 71 in Hennepin
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 US 6 in Princeton
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| North end: |
 I-80 in Princeton |
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Interstate 180 (abbreviated I-180) is a north–south spur highway that runs from Princeton, Illinois to the small town of Hennepin, Illinois on its southern terminus. It is 13.19 miles (21.23 km) long.
Interstate 180 winds through a forested, hilly area in north-central Illinois. The local topography surrounding I-180 is heavily influenced by the Illinois River. It has four lanes for its entire length.
Construction of I-180 was completed in 1969. The freeway was built primarily to connect Interstate 80 to a new Jones & Laughlin steel plant built in 1965 at Hennepin, IL. However, the steel plant closed soon after I-180 was built, and did not re-open until August 2002. I-180 is one of the least traveled interstates in the nation, serving 1,950–3,600 vehicles per day as of 2013.
The Illinois Department of Transportation does not provide exit numbers for any exits on I-180.
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