IL 23 highlighted in red | ||||
Route information | ||||
Maintained by IDOT | ||||
Length | 122.77 mi[1] (197.58 km) | |||
Existed | November 5, 1918[2]–present | |||
Major junctions | ||||
South end | ![]() | |||
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North end | ![]() | |||
Location | ||||
Country | United States | |||
State | Illinois | |||
Counties | Livingston, LaSalle, DeKalb, McHenry | |||
Highway system | ||||
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Illinois Route 23 (IL 23) is a north–south state highway in northern Illinois. It runs from Illinois Route 116 in Pontiac north to U.S. Route 14 south of Harvard. This is a distance of 122.77 miles (197.58 km).[1]
Illinois 23 was established in 1918 as one of the original 46 SBI routes. The routing of Illinois 23 has not changed since its establishment.
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