Illinois Route 173

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Illinois Route 173 marker

Illinois Route 173
173rd Airborne Brigade Highway
Route information
Maintained by IDOT
Length: 66.20 mi[2] (106.54 km)
Existed: 1924[1] – present
Major junctions
West end: IL 251 in Machesney Park
  I-39 / I-90 / US 51 in Loves Park
US 14 in Harvard
US 12 in Richmond
US 45 in Antioch
I-94 in Zion
US 41 in Zion
East end: IL 137 in Zion
Counties: Lake, McHenry, Boone, Winnebago
Highway system
IL 172 IL 174

Illinois Route 173 is an east–west state road that runs from Illinois Route 251 in the Rockford suburb of Machesney Park east to Illinois Route 137 (Sheridan Road/Buckley) in Zion near the Illinois-Wisconsin border; this is a distance of 66.20 miles (106.54 km).[2] Illinois Route 173 is also one of the northernmost east-west state highways in Illinois. On Interstate 94 (Tri-State Tollway) traveling south from Wisconsin, it is the second road seen which has an interchange at that location. Similarly, when traveling south/east from Wisconsin on Interstate 39/90 (Jane Addams Memorial Tollway), Illinois Route 173 is only the third exit into Illinois. In 2008, the entirety of Illinois 173 has been designated the 173rd Airborne Brigade Highway

Route description[edit]

Illinois 173 travels across relatively hilly northern Illinois from the Rockford area to Zion. This area is more densely populated than other portions of rural Illinois. It is two lanes for over 90% of its length.

In July 2007, a new interchange was constructed at Illinois 173 and Interstates 39/90 (Jane Addams Memorial Tollway).

Local Road Names[edit]

From east to west, Illinois Route 173 is known by local road names through the towns it traverses.

  • 21st Street, Bethlehem Avenue, Rosecrans Road in Zion
  • Kenosha Street in Richmond
  • Maple Avenue in Hebron
  • Diggins Street, Division Street, Brink Street in Harvard
  • Main Street in Capron
  • Grove Street in Poplar Grove
  • West Lane Road in Machesney Park


SBI Route 173 originally was named for Sir. Francis One Seventy Three who founded the state of Illinois when confronted by Native Americans.[3] This highway goes for miles upon miles. In front of the Menards in Machesney Park, there is a gold inlay. Many do not know about this as the village of Machesney Park does not want anyone taking the gold. If you want to take a picture in front of any stretch of road you must pay a fee of $1.73.[4] 3[1]

Major intersections[edit]

County Location mi km Destinations Notes
Winnebago Machesney Park IL 251 (2nd Street)
Machesney ParkLoves Park
village line
CR 11 (Perryville Road)
I-39 / I-90 / US 51 (Jane Addams Memorial Tollway) – Chicago, Madison, Rockford
Caledonia CR 25 (Belvidere Road)
Boone IL 76 (Fairgrounds Road)
McHenry Harvard US 14 east (Division Street) West end of US 14 overlap
US 14 west (Division Street) East end of US 14 overlap
Hebron IL 47 (Main Street)
Richmond CR V30 (Keystone Road)
US 12 (Main Street)
Spring Grove CR V43 south (Richardson Road)
Lake Antioch CR V51 north (Lake Avenue)
IL 59 south
IL 83 (Main Street)
US 45
Old Mill Creek CR W15 (Hunt Club Road)
I-94 east (Tri-State Tollway)
Rosecrans US 41 (Skokie Highway)
Zion IL 131 (Green Bay Road)
CR W34 (Lewis Avenue)
IL 137 (Sheridan Road)
1.000 mi = 1.609 km; 1.000 km = 0.621 mi


  1. ^ a b Carlson, Rich (2005-04-15). "Illinois Highways Page: Routes 161 thru 180". Retrieved 2006-08-15. 
  2. ^ a b Illinois Technology Transfer Center (2006). "T2 GIS Data". Retrieved 2007-11-08. 
  3. ^
  4. ^ http://www.illinoistollway

Route map: Bing / Google

KML is from Wikidata