List of Illinois Routes

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Illinois Routes
Illinois Route 59 markerIllinois Route 126 marker
Standard Illinois route markers
System information
Maintained by IDOT
Formed: November 5, 1918 (1918-11-05)[1]
Highway names
Interstates: Interstate X (I-X)
US Routes: U.S. Route X (US X)
State: Illinois Route X (IL X)
System links

The Illinois Routes are the highways in the State Highway System of the U.S. state of Illinois that are not simultaneously part of the Interstate Highway System or the United States Numbered Highway System. These highways are maintained by the Illinois Department of Transportation (IDOT).


List of Illinois Routes[edit]

Former routes are listed in italics.

1-10[edit]

Route name Region Orientation Length
Miles Kilometers
Illinois 1.svg Illinois Route 1 Eastern North-south 325.59 523.99
Illinois 2.svg Illinois Route 2 Northwestern East-west 120 194
Illinois 3.svg Illinois Route 3 Southwestern North-south 190 306
Illinois 4.svg Illinois Route 4 Central North-south 160 257
Illinois 4A.svg Illinois Route 4A
Illinois 5.svg Illinois Route 5 Northwestern East-west 20 32
Illinois 6.svg Illinois Route 6 Central North-south 10.06 16.19
Illinois 7.svg Illinois Route 7 Northeastern Southwest-northeast (marked north-south) 28.06 45.16
Illinois 8.svg Illinois Route 8 Central East-west 60 97
Illinois 9.svg Illinois Route 9 Central East-west 190 306
Illinois 10.svg Illinois Route 10 Central East-west 91 146

11-20[edit]

Route name Region Orientation Length
Miles Kilometers
Illinois 11.svg Illinois Route 11
Illinois 12.svg Illinois Route 12
Illinois 13.svg Illinois Route 13 South central East-west 152 244
Illinois 14.svg Illinois Route 14 South central East-west 81 130
Illinois 15.svg Illinois Route 15 Southern East-west 144 232
Illinois 16.svg Illinois Route 16 Central East-west 172 277
Illinois 17.svg Illinois Route 17 North central East-west 209.4 337
Illinois 18.svg Illinois Route 18 Central East-west 39.01 62.78
Illinois 19.svg Illinois Route 19 Northeastern East-west 33.64 54.14
Illinois 20.svg Illinois Route 20

21-30[edit]

Route name Region Orientation Length
mi km
Illinois 21.svg Illinois Route 21 Northern East-west 28.13 45.27
Illinois 22.svg Illinois Route 22 Northeastern East-west 19.7 31.7
Illinois 23.svg Illinois Route 23 Central North-south 126.17 203.05
Illinois 24.svg Illinois Route 24
Illinois 25.svg Illinois Route 25 Northeastern North-south 35.04 56.39
Illinois 26.svg Illinois Route 26 Central North-south 139.35 224.26
Illinois 27.svg Illinois Route 27
Illinois 28.svg Illinois Route 28
Illinois 29.svg Illinois Route 29 North-central North-south 175.36 282.21
Illinois 30.svg Illinois Route 30

31-40[edit]

Route name Region Orientation Length
mi km
Illinois 31.svg Illinois Route 31 Northeastern North-south 58.41 94.00
Illinois 32.svg Illinois Route 32 Central North-south 69.32 111.56
Illinois 33.svg Illinois Route 33 Eastern Multidirectional 97.17 156.38
Illinois 34.svg Illinois Route 34 Southern North-south 61.74 99.36
Illinois 35.svg Illinois Route 35 Northwestern East-west 2.42 3.89
Illinois 36.svg Illinois Route 36
Illinois 37.svg Illinois Route 37 Southern North-south 155.07 249.56
Illinois 38.svg Illinois Route 38 Northern East-west 89.28 143.68
Illinois 39.svg Illinois Route 39
Illinois 40.svg Illinois Route 40 Central North-south 112.05 180.33

41-50[edit]

51-60[edit]

61-70A[edit]

71-80[edit]

81-90[edit]

91-100[edit]

101-110[edit]

111-120[edit]

121-130A[edit]

131-140[edit]

141-150[edit]

151-160[edit]

161-170[edit]

171-180[edit]

181-200[edit]

201-300[edit]

301 and up[edit]

Unnumbered routes[edit]

Some routes in Illinois are state maintained, but not numbered.[2]

Some old alignments of routes are state maintained, but are not signed. They still may, however, have an unsigned designation. These are referred to as Illinois I.D routes. [3]

See also[edit]

References[edit]

  1. ^ Carlson, Miriam C. (April 2002). "Out of the Mud: Illinois' Good Roads Movement". Illinois History (Illinois Historic Preservation Agency) 55 (3): 47–9. ISSN 0019-2058 – via Illinois Periodicals Online. 
  2. ^ Cook County Highway Department (June 19, 2007) (PDF). Highway System showing Maintenance Districts (Map). 1:90,000. Cartography by Map Division. http://www.cookcountygov.com/Agencies/hwy/SysRoute_0707.pdf. Retrieved February 12, 2011.
  3. ^ Burmaster, Bill. "Illinois State I.D. Routes". Roads of the Mid-South & West. Self-published. Retrieved April 25, 2014. [unreliable source]

External links[edit]