Illinois Route 18

Illinois Route 18 (IL 18) is a rural east–west state road in central Illinois. It runs east from the town of Henry at Illinois Route 29 to the town of Blackstone at Illinois Route 17. This is a distance of 39.01 miles (62.78 km).[2]

Illinois Route 18 marker

Illinois Route 18
IL 18 highlighted in red
Route information
Maintained by IDOT
Length39.01 mi[2] (62.78 km)
Major junctions
West end IL 29 in Henry
  I-39 / US 51 in Lostant
East end IL 17 in Blackstone
CountiesStark, Marshall, Putnam, LaSalle, Livingston
Highway system
IL 17IL 19
IL 18 crosses over the Illinois River at Henry, Illinois

Route descriptionEdit

Illinois 18 crosses the Illinois River at Henry, and is the first river crossing south of Interstate 180. The terrain is generally flat outside of the Illinois River Valley area. In Streator, Illinois 18 westbound becomes Main Street. Eastbound, it becomes Bridge Street.


From 1918 through 1927, SBI Route 18 ran from Chicago to Princeton using modern U.S. Route 34. In 1939, it was applied to what was then SBI Route 17. The next year, the route was completed and Illinois 17 moved to a new highway south of Streator.[1]

Major intersectionsEdit

StarkHenry0.00.0  IL 29 (University Street)
Illinois River1.21.9Henry Bridge
Marshall2.13.4  IL 26 southWest end of IL 26 overlap
Putnam2.84.5  IL 26 northEast end of IL 26 overlap
Magnolia9.915.9  IL 89
La Salle16.526.6   I-39 / US 51 – Bloomington-Normal, RockfordI-39 exit 41
17.027.4  IL 251
Streator29.146.8  IL 23 (Bloomington Street, Park Street)
Livingston39.0162.78   IL 17 to I-55
1.000 mi = 1.609 km; 1.000 km = 0.621 mi


  1. ^ a b Carlson, Rick. Illinois Highways Page: Routes 1 thru 20. Last updated March 15, 2005. Retrieved March 31, 2006.
  2. ^ a b Illinois Technology Transfer Center (2007). "T2 GIS Data". Retrieved November 8, 2007.
  3. ^ Google Maps, [1]

External linksEdit

Route map:

KML is from Wikidata