Illinois Route 73

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Illinois Route 73 marker

Illinois Route 73
Route information
Maintained by IDOT
Length: 29.32 mi[2] (47.19 km)
Existed: 1924[1] – present
Major junctions
South end: US 52 / IL 64 in Lanark
  US 20 in Lena
North end: WIS County M.svg CTH M in Winslow
Counties: Carroll, Stephenson
Highway system
IL 72 I-74

Illinois Route 73 is a north–south state highway in northwest Illinois. It runs from the U.S. Route 52/Illinois Route 64 concurrency south of Lanark north to the Wisconsin border north of Winslow. This is a distance of 29.32 miles (47.19 km).[2]

Route description[edit]

Illinois 73 is a two-lane surface road for its entire length. At its northern terminus, Illinois 73 becomes County Highway M in Green County, Wisconsin. This is the only state highway that does not either continue as another state highway, or end at a ferry crossing (current or former).[1]


SBI Route 73 existed from Illinois Route 72 north of Lanark to Winslow. Around 1982, it replaced Illinois 72 from north of Lanark south to U.S. Route 52.[1]

Major intersections[edit]

County Location mi km Destinations Notes
Carroll Lanark 0.00 0.00 US 52 / IL 64 – Mount Carroll, Brookville Southern terminus of IL 73
IL 72 – Shannon Western terminus of IL 72
Stephenson Lena US 20 – Stockton, Freeport
Winslow CTH-M (Carter Street) Northern terminus of IL 73; Wisconsin state line
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

External links[edit]


  1. ^ a b c Carlson, Rich. Illinois Highways Page: Routes 61 through 80. Last updated March 15, 2005. Retrieved April 2, 2006.
  2. ^ a b Illinois Technology Transfer Center (2007). "T2 GIS Data". Retrieved 2007-11-08.