Illinois Route 128

Illinois Route 128 is a northsouth state road in east-central Illinois. It runs from Interstate 70 in Altamont to Illinois Route 121 in Dalton City. This is a distance of 55.57 miles (89.43 km).[1]

Illinois Route 128
Route information
Maintained by IDOT
Length55.57 mi[1] (89.43 km)
Major junctions
South end I-70 in Altamont[3]
  US 40 in Altamont
North end IL 121 in Dalton City
CountiesEffingham, Fayette, Shelby, Macon, Moultrie*
Highway system
IL 127IL 129

Route description

Illinois 128 is a two-lane, rural surface road for its entire length. Immediately north of Interstate 70, it overlaps U.S. Route 40 for 3 miles (5 km). It is also concurrent with Illinois Route 16 near Shelbyville.

Illinois 128 may or may not run through Moultrie County, depending on its exact routing, as the route appears to run along portions of the Shelby/Moultrie and Macon/Moultrie county lines.


SBI Route 128 originally ran from U.S. Route 40 (originally Illinois Route 11) to Illinois 16 west of Shelbyville. In March 1937, it replaced IL 169 north of Shelbyville to Dalton City.[4] Finally, as Interstate 70 was being built in the 1950s and 1960s, it was extended along U.S. 40 to Altamont.[2]

Major Intersections

EffinghamAltamont0.00.0 I-70 Effingham, St. LouisI-70 exit 82
0.81.3 US 40 eastSouth end of US 40 concurrency
county line
4.16.6 US 40 west VandaliaNorth end of US 40 concurrency
14.523.3 IL 33 east Beecher City
Shelby30.949.7 IL 16 west PanaSouth end of IL 16 concurrency
Shelbyville34.054.7 IL 16 east MattoonNorth end of IL 16 concurrency
MoultrieDalton City55.5789.43 IL 121 Decatur, Mattoon
1.000 mi = 1.609 km; 1.000 km = 0.621 mi


  1. Illinois Technology Transfer Center (2006). "T2 GIS Data". Retrieved 2007-11-08.
  2. Carlson, Rich. Illinois Highways Page: Routes 121 thru 140. Last updated March 15, 2005. Retrieved May 12, 2006.
  3. Sarjeant, Charles. Illinois Highway Ends: Illinois 128. Retrieved May 12, 2006.
  4. "State Highway Markings to be Changed". The Journal Gazette. March 29, 1937. p. 1. Retrieved December 12, 2016 via
  5. Google (March 2, 2017). "Overview Map of IL 128" (Map). Google Maps. Google. Retrieved March 2, 2017.
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