Illinois Route 128

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Illinois Route 128 marker

Illinois Route 128
Route information
Maintained by IDOT
Length: 55.57 mi[1] (89.43 km)
Existed: 1924[2] – present
Major junctions
South end: I-70 in Altamont[3]
  US 40 in Altamont
North end: IL 121 in Dalton City
Counties: Effingham, Fayette, Shelby, Macon, Moultrie*
Highway system
IL 127 IL 129

Illinois Route 128 is a north–south 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]

Route description[edit]

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 1937, it replaced Illinois Route 169 north of Shelbyville to Dalton City. Finally, as Interstate 70 was being built in the 1950s and 1960s, it was extended along U.S. 40 to Altamont.[2]


  1. ^ a b Illinois Technology Transfer Center (2006). "T2 GIS Data". Retrieved 2007-11-08. 
  2. ^ a b 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.