Contents

List of state routes in Illinois

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), with the exception of Illinois Route 390 and parts of Illinois Route 56 and Illinois Route 110, which are maintained by the Illinois State Toll Highway Authority (ISTHA), and all routes that enter the Chicago City Limits are maintained by the Chicago Department of Transportation.

History[edit]

Illinois's state route numbers originated in 1918 as State Bond Issues 1 through 46, used to finance the new roads. The numbers of the bond issues were then used to mark the highway routes along the way. Another series of bond issues were authorized in 1924 (47–185) and again were used to mark the roads they paid for. After that the route numbers evolved into a separate system. The State Bond Issue numbers (SBI) remained as inventory designations on the original routes even after the numbered portion was changed, deleted or rerouted. These SBI numbers remain on IDOT district maps to this day and are used along with other designations for bid requests and other official documents.^[2]

During the middle part of the 20th century the state numbered routes expanded to new roads around the state. When the United States Numbered Highway System was introduced in the late 1920s many of the new US Routes were already part of the state system and the US number was just added to signposts. During 1930s as the US Highway System matured, redundant state numbers were often removed from US Routes. During 1950s and into 1980s, as the Interstate Highway System started to supplant many US Routes, redundant numbers were removed or replaced with state numbers. After the original Interstate Highways were substantially completed in the early 1970s many state (and US) routes, especially in the Chicago metro area, were removed or shortened as unnecessary.^[2]

While US and Interstate systems use even numbers for primary east–west routes and odd for north–south, there is no such rule for Illinois route numbers. Also, three-digit route numbers are usually not related to their one- or two-digit counterpart. There are several exceptions to this however.^{[citation needed]}

General notes[edit]

Illinois has used route numbers from IL 1 through IL 186 inclusive^[2] as well as many others up to IL 594.^[3]

Illinois has used letter suffixes on several state highways, including "A", "B". "C", "N" (for north) and "S" (for south).^[2] A, B and C suffixes were used for spurs of a nearby route, the N and S were legs of IL 113 on either side of the Kankakee River.^[4]

Illinois has also used special routes, such as "Business", "Alternate", "City", "Bypass" and "Truck" on state-numbered highways. Only a pair of truck routes as well as a batch of Business Routes remain in Illinois, all other special state highways have been renumbered or the markers removed.^[5]

Primary routes[edit]

Number	Length (mi)	Length (km)	Southern or western terminus	Northern or eastern terminus	Formed	Removed	Notes
IL 1	323.06	519.91	Cave in Rock Ferry in Cave in Rock	I-57inChicago	01918-01-011918	current	IL 1 was posted on what is now IL 394 from 1957 to 1964, the old road was Alt. IL 1 during that time
IL 2	73.91	118.95	IL 40inSterling	WIS 213inSouth Beloit	01918-01-011918	current	Originally Rockford to Dixon to Mendota to Cairo; replaced by US 51 south of Mendota
IL 3	187.44	301.66	US 51/IL 37inCairo	IL 100inGrafton	01918-01-011918	current	Originally Morrison to Chester, replaced by other roads including IL 78 and US 67 north of the St. Louis area
IL 4	170.44	274.30	IL 13/IL 127inMurphysboro	I-55 Bus./IL 29inSpringfield	01918-01-011918	current	Originally Chicago to St. Louis, mostly replaced by US 66 except from Springfield to Staunton where IL 4 was used on the old road and US 66 on the new; IL 4 replaced the old IL 43 Staunton to near Murphysboro
IL 4A	—	—	—	—	01925-01-011925	01967-01-011967	Ran Chicago to Joliet along Archer Av., Replaced by IL 171
IL 5	—	—	—	—	01918-01-011918	01967-01-011967	Originally Chicago to East Dubuque, replaced mostly by US 20 except near Rockford until that was replaced later by Business US 20;
IL 5	15.78	25.40	US 67inRock Island	I-80/I-88/IL 92/IL 110 (CKC)inEast Moline	01971-01-011971	current	replaced IL 190 on the East–West Tollway until 1987 when it was replaced by I-88 east of I-80
IL 6	—	—	—	—	01918-01-011918	01933-01-011933	Originally Chicago to Fulton, replaced by US 30, later to become Alt. US 30 and now IL 38
IL 6	10.11	16.27	I-74/I-474inPeoria	IL 29inMossville	01971-01-01c. 1971	current	applied to freeway extension of I-474 around 1982
IL 7	28.06	45.16	US 6inRockdale	IL 43inWorth	01918-01-011918	current	Originally Chicago to East Moline, replaced west of Orland Park by US 6 about 1928 then extended to Rockdale in 1969
IL 8	45.51	73.24	IL 97inMaquon	US 24inWashington	01918-01-011918	current	Originally Gulfport to Sheldon, removed in parts and replaced by US 34, US 24 and other routes
IL 9	218.31	351.34	Iowa 2inNiota	SR 26/SR 352inHoopeston	01918-01-011918	current	Originally Hamilton to Cheneyville, replaced in part by US 136, IL 41 and IL 9
IL 10	91.35	147.01	US 136inEaston	US 150inChampaign	01918-01-011918	current	Originally Jacksonville to Decatur, later extended to Danville and Havana
IL 11	—	—	—	—	01918-01-011918	01933-01-011933	Originally Terre Haute to St. Louis, replaced by US 40
IL 11	—	—	—	—	01945-01-011945	01948-01-011948	replaced by US 40 alternate, and now IL-140
IL 12	—	—	—	—	01918-01-011918	01933-01-011933	Originally Vincennes, IN to St. Louis, replaced by US 50
IL 13	151.54	243.88	IL 157/IL 163inCentreville	KY 56inOld Shawneetown	01918-01-011918	current	Originally Old Shawneetown to St. Louis
IL 14	76.24	122.70	US 51inDu Quoin	SR 66inPhillipstown	01918-01-011918	current	Originally DuQuoin to Carmi
IL 15	149.64	240.82	I-55/I-64/US 40/IL 3inEast St. Louis	SR 64inMt. Carmel	01918-01-011918	current	Originally East St. Louis to Albion
IL 16	174.66	281.09	IL 100inHardin	US 150/IL 1/IL 133inParis	01918-01-011918	current	Originally Paris to Litchfield, later extended west to Hardin; IL 316 replaced IL 16 after a new road was built from Mattoon to Charleston in 1962
IL 17	209.4	337.0	1st Street in New Boston	SR 2inGrant Park	01918-01-011918	current	Originally Lacon to Grant Park. Ferry at New Boston dropped in 1973
IL 18	—	—	—	—	01918-01-011918	01933-01-011933	Originally Princeton to Chicago (Ogden Av.)
IL 18	39.01	62.78	IL 29inHenry	IL 17inBlackstone	01939-01-011939	current	Replaced IL 89B and 89C
IL 19	—	—	—	—	01918-01-011918	01933-01-011933	Originally Chicago to Harvard on what is now US-14
IL 19	33.64	54.14	IL 25inElgin	US 41inChicago	01949-01-011949	current	moved to current route in 1949
IL 20	—	—	—	—	01919-01-011919	01941-01-011941	Replaced in 1941 by IL 120 after confusion with the nearby US-20
IL 21	28.13	45.27	IL 43inNiles	US 41inGurnee	01918-01-011918	current	This is Milwaukee Ave. Originally Antioch to Chicago.
IL 22	19.7	31.7	US 14inFox River Grove	US 41inHighland Park	01918-01-011918	current	Originally the "22 Loop" around the Chicago metro area. It followed the current IL-22, then went to Crystal Lake via US-14, Aurora via IL-31 and Lynwood on US-30.
IL 22A	—	—	—	—	01924-01-011924	01925-01-011925	Became part of IL 63, which was deleted in 1973; Now IL 68
IL 23	126.17	203.05	IL 116inPontiac	US 14inHarvard	01918-01-011918	current	Part of it (Streator to Pontiac) was once IL 118
IL 24	—	—	—	—	01918-01-011918	01940-01-011940	Replaced by IL 29 by 1940
IL 25	—	—	—	—	01918-01-011918	01933-01-011933	Kankakee to Fairfield, replaced by US-45.
IL 25	35.04	56.39	US 34inOswego	IL 62inCarpentersville	01934-01-011934	current	Reused in the 1930s on current route.
IL 26	139.35	224.26	IL 116inEast Peoria	WIS 69inOrangeville	01918-01-011918	current	Originally Freeport to Polo, extended north to the state line to replace IL-74 and south to Bureau then E. Peoria replacing IL-89 and IL-87 in part. Rerouted to the I-180 bridge in the 1990s due to a bridge removal over the Illinois River
IL 27	—	—	—	—	01918-01-011918	01934-01-011934	Was Savanna to Polo, Now part of US 52
IL 28	—	—	—	—	01918-01-011918	01933-01-011933	Was Sheffield to Galesburg, Now part of US 34
IL 29	175.36	282.21	US 51/IL 16inPana	US 6/IL 89inSpring Valley	01918-01-011918	current	Originally DePue to Peoria, extended in the 1930s and 40s.
IL 30	—	—	—	—	01918-01-011918	01941-01-011941	Was Peoria to Galva, Replaced by US-150, IL-17, IL-78, US-34 and IL 91
IL 31	—	—	—	—	01918-01-011918	01933-01-011933	Was Quincy to Canton, replaced by US-24, IL-78 and IL-100.
IL 31	58.41	94.00	US 34inOswego	US 12inRichmond	01937-01-011937	current	Current route marked in 1937.
IL 32	69.32	111.56	US 40/IL 33inEffingham	IL 48inCisco	01918-01-011918	current	Originally Decatur to Windsor, extended to Effingham in 1936 then to Cisco in 1998.
IL 33	97.17	156.38	IL 128inBeecher City	US 50inLawrenceville	01918-01-011918	current	Originally Effingham to Gordon, extended to current route in stages.
IL 34	61.74	99.36	Hopkinton Street / Walnut Street in Rosiclare	IL 14/IL 37inBenton	01918-01-011918	current	Originally was a "T" Shaped route from Harrisburg to Elizabethtown and a leg south to Golconda and a ferry went to KY-297 across the Ohio River. Extended to Benton and to Rosiclare in 1937. Part of this is now IL-146.
IL 35	—	—	—	—	01918-01-011918	01933-01-011933	Used from Mound City to US-51, barely 1 mile long, to serve a federal cemetery. This is now part of IL-37 (part of IL-147 for a short time).
IL 35	2.42	3.89	US 20inEast Dubuque	WIS 35inEast Dubuque	01938-01-011938	current	Used from E. Dubuque to the WI State Line, replacing IL-79.
IL 36	—	—	—	—	01918-01-011918	01937-01-011937	Replaced by IL 94
IL 37	155.07	249.56	US 51inCairo	US 45inWatson	01918-01-011918	current
IL 38	—	—	—	—	01918-01-011918	01941-01-011941	Replaced by IL 16, IL 159 (then IL 112, and IL 138
IL 38	89.28	143.68	US 52inDixon	US 12/US 20/US 45inWestchester	01971-01-011971	current
IL 39	—	—	—	—	01918-01-011918	01933-01-011933	Now part of US 150
IL 40	—	—	—	—	01918-01-011918	01938-01-011938	became part of IL 88
IL 40	112.05	180.33	I-74/IL 29inEast Peoria	IL 78inMount Carroll	01995-01-011995	current	Formerly IL 88
IL 41	37.53	60.40	US 136inAdair	US 34/IL 110 (CKC)/IL 164inGalesburg	01918-01-011918	current
IL 42	—	—	—	—	01918-01-011918	01972-01-011972	Ran from Chicago to Winthrop Harbor, part of it is now IL-173. Was the designation of Sheridan Road
IL 42A	—	—	—	—	01925-01-011925	01967-01-011967	Replaced by IL 43
IL 43	—	—	—	—	01918-01-011918	01933-01-011933	Replaced by IL-120 and IL-122.
IL 43	—	—	—	—	01935-01-011935	01963-01-011963	Former IL-150 and IL-151; replaced by IL-4.
IL 43	60.3	97.0	US 30inFrankfort	US 41/IL 120inPark City	01967-01-011967	current	Formerly IL 42A
IL 44	—	—	—	—	01918-01-011918	01940-01-011940	Now part of US 52
IL 45	—	—	—	—	01918-01-011918	01934-01-011934	Became IL 179 in 1936; IL 179 was deleted by 1995
IL 46	—	—	—	—	01918-01-011918	01938-01-011938	Became in part US 45 from La GrangetoDes Plaines[6]
IL 47	169.76	273.20	IL 10inSeymour	WIS 120inHebron	01924-01-011924	current
IL 48	85.38	137.41	IL 127inRaymond	IL 54inDeWitt	01924-01-011924	current
IL 49	140.86	226.69	IL 33inWillow Hill	US 45/US 52inAshkum	01924-01-011924	current	Originally Willow Hill (Near Jasper) to Chicago
IL 50	66.49	107.01	US 45/US 52inKankakee	US 41inSkokie	01924-01-011924	current
IL 51	—	—	—	—	01924-01-011924	01933-01-011933	Now part of US 45
IL 52	—	—	—	—	01924-01-011924	01938-01-011938	Replaced by IL 83; Originally Lemont to Lynwood
IL 53	82.02	132.00	I-55inGardner	IL 83inLong Grove	01924-01-011924	current
IL 54	—	—	—	—	01924-01-011924	01941-01-011941	Replaced by IL 83; Originally Lemont to Lynwood
IL 54	109.35	175.98	I-55inSpringfield	US 45inOnarga	01972-01-011972	current	Formerly US 54; Originally Antioch to Lemont
IL 55	—	—	—	—	01924-01-011924	01964-01-011964	Now IL 56; Originally Chicago to Oak Brook
IL 56	32.52	52.34	US 30/IL 47inSugar Grove	US 12/US 20/US 45inBellwood	01924-01-011924	current	Butterfield Road
IL 57	—	—	—	—	01924-01-011924	01933-01-011933	Replaced by US 41 and IL-50
IL 57	12.59	20.26	I-172/IL 110 (CKC)inFall Creek	US 24/IL 104inQuincy	01949-01-011949	current	Originally Hull to Quincy. Route was moved to its current routing when I-172, now I-72, was completed.
IL 58	28.3	45.5	IL 25inElgin	US 41inSkokie	01924-01-011924	current
IL 59	71.13	114.47	I-55inShorewood	IL 173inAntioch	01924-01-011924	current
IL 59A	—	—	—	—	—	—	Replaced by IL 60
IL 60	—	—	—	—	01924-01-011924	01937-01-011937	Replaced by US 12
IL 60	17.22	27.71	IL 120inVolo	US 41inLake Forest	01967-01-011967	current	Formerly IL 59A
IL 61	—	—	—	—	01924-01-011924	01933-01-011933	Richmond to Crystal Lake; now IL 31 (then part of US 12)
IL 61	44.77	72.05	IL 96inUrsa	US 136/IL 110/IL 336inTennessee	01935-01-011935	current
IL 62	20.82	33.51	IL 31inAlgonquin	IL 83inDes Plaines	01924-01-011924	current	Originally Algonquin to Chicago (Harlem Ave.) on Algonquin Road west of Des Plaines. In Des Plaines, this was on Oakton Street and then in Park Ridge, it was Talcott Road into Chicago. IL 62 originally ended at IL 43 (Harlem Ave.) In 1974, IL 62 was removed east of IL 83 in Des Plaines.[7]
IL 63	—	—	—	—	01924-01-011924	01973-01-011973	Replaced in part by IL 21, IL 59, and IL 68
IL 64	138.61	223.07	US 52/Iowa 64inSavanna	US 41inChicago	01924-01-011924	current
IL 65	—	—	—	—	01924-01-011924	01971-01-011971[8]	Swapped routes with US 34
IL 66	—	—	—	—	01924-01-011924	01933-01-011933	Now IL 126
IL 67	—	—	—	—	01924-01-011924	01940-01-011940	Replaced in part by IL 176
IL 68	—	—	—	—	01924-01-011924	01937-01-011937	Now IL 131
IL 68	25.74	41.42	IL 72inEast Dundee	I-94/US 41inGlencoe	01942-01-011942	current	Dundee Road; Originally Lake Bluff to Russell
IL 69	—	—	—	—	01924-01-011924	01940-01-011940	Now part of US 52
IL 70	19.01	30.59	West Howard Street/Oak Street in Durand	US 20 Bus.inRockford	01924-01-011924	current	Originally Durand to Mendota
IL 70A	—	—	—	—	01924-01-011924	01938-01-011938	Replaced by IL 170 (then IL 186)
IL 71	69.37	111.64	I-180/IL 29inHennepin	US 34inOswego	01938-01-011938	current	Former IL 7A and IL 89A
IL 72	110.71	178.17	IL 73inLanark	IL 43inChicago	01924-01-011924	current	Originally Lanark to Starks
IL 73	29.32	47.19	US 52/IL 64inLanark	Wisconsin state line near Winslow	01924-01-011924	current
IL 74	—	—	—	—	01924-01-011924	01937-01-011937	Replaced in part by IL 26
IL 75	41.64	67.01	IL 26inFreeport	WIS 67inSouth Beloit	01924-01-011924	current
IL 76	15.67	25.22	Business US 20inBelvidere	WIS 140 east of South Beloit	01924-01-011924	current
IL 77	—	—	—	—	01924-01-011924	01936-01-011936	Replaced by IL 64
IL 77	—	—	—	—	01936-01-011936	01937-01-011937	Replaced by US 40 Bypass
IL 78	215.51	346.83	US 67/Business US 67/IL 104inJacksonville	WIS 78 near Warren	01924-01-011924	current
IL 79	3	4.8	East Dubuque	WI State Line	01918-01-011918	01938-01-011938	Replaced by IL 35
IL 79	—	—	Mississippi River	Fall Creek	01967-01-011967	01981-01-011981	Replaced by IL 336
IL 80	—	—	—	—	—	01964-01-011964	Now part of US 150 and IL 84
IL 81	25.78	41.49	US 150inLynn Center	IL 78inKewanee	01924-01-011924	current
IL 82	28.84	46.41	IL 17inBishop Hill	IL 92 north of Geneseo	01924-01-011924	current
IL 83	—	—	—	—	01924-01-011924	01940-01-011940	Now part of IL 17
IL 83	92.22	148.41	US 30inLynwood	WIS 83 north of Antioch	01941-01-011941	current	Originally Galva to New Boston on what is now IL 17
IL 83A	—	—	—	—	01924-01-011924	01940-01-011940	Now unnumbered
IL 84	93.93	151.17	—	—	01924-01-011924	01937-01-011937	Replaced by IL 2; now IL 92
IL 84	93.93	151.17	US 6inColona	WIS 80 near Galena	01955-01-011955	current
IL 85	—	—	—	—	01924-01-011924	01933-01-011933	Now part of US 67
IL 86	—	—	—	—	01924-01-011924	01937-01-011937	Now IL 2
IL 87	—	—	—	—	01924-01-011924	01935-01-011935	unbuilt spur to Dixon
IL 87	—	—	—	—	01941-01-011941	01969-01-011969	Now IL 26
IL 88	—	—	—	—	01924-01-011924	01995-01-011995	Replaced the original IL 40 in 1938; now IL 40
IL 88A	—	—	—	—	—	01938-01-011938	Replaced partly by IL 17
IL 89	55.48	89.29	IL 116inMetamora	US 34inLaMoille	01924-01-011924	current
IL 89A	—	—	—	—	01924-01-011924	01938-01-011938	Now part of IL 71
IL 89B	—	—	—	—	01924-01-011924	01939-01-011939	Now part of IL 18
IL 89C	—	—	—	—	01924-01-011924	01939-01-011939	Now part of IL 18
IL 90	15.8	25.4	IL 78 near Laura	IL 40 near Edelstein	01924-01-011924	current
IL 91	—	—	—	—	01924-01-011924	01934-01-011934	Replaced by US 150
IL 91	40.72	65.53	US 150inPeoria	US 34/IL 78inKewanee	01939-01-011939	current	Formerly IL 30
IL 92	106.41	171.25	Iowa 92 near Muscatine, Iowa	US 34inLaMoille	01939-01-011939	current
IL 93	9.6	15.4	IL 91inElmira	IL 40inBradford	01924-01-011924	current
IL 94	128.76	207.22	US 24inCamp Point	US 67inOak Grove	01924-01-011924	current
IL 94A	—	—	—	—	01924-01-011924	01937-01-011937	Now IL 164
IL 94B	—	—	—	—	01924-01-011924	01937-01-011937	Now IL 135
IL 95	17.12	27.55	IL 41inBardolph	IL 97inCuba	01924-01-011924	current
IL 95A	—	—	—	—	01924-01-011924	01937-01-011937	Now IL 94
IL 96	141.16	227.17	IL 100inKampsville	IL 94inLomax	01924-01-011924	current
IL 97	—	—	—	—	01924-01-011924	01933-01-011933	Replaced by US 124; now IL 116
IL 97	104.43	168.06	I-55/I-72/US 36inSpringfield	US 150inKnoxville	01938-01-011938	current
IL 97A	—	—	—	—	—	01937-01-011937	Now IL 116
IL 98	—	—	—	—	01924-01-011924	01937-01-011937	Replaced by IL 10
IL 98	8.36	13.45	IL 29inPekin	I-155inMorton	01939-01-011939	current
IL 99	—	—	—	—	01924-01-011924	01935-01-011935	Replaced by IL 94 and IL 61
IL 99	32.08	51.63	IL 104inChambersburg	IL 101inBrooklyn, Schuyler County	01936-01-011936	current
IL 100	159.09	256.03	US 67inAlton	IL 78inDunfermline	01924-01-011924	current
IL 101	19.43	31.27	IL 61inAugusta	US 67inLittleton	01924-01-011924	current
IL 102	18.33	29.50	—	—	01924-01-011924	01955-01-011955	Chatton to Camp Point; now IL 94 and IL 61
IL 102	18.33	29.50	US 45/US 52inBourbonnais	IL 53inWilmington, Will County	01961-01-011961	current	Formerly IL 113N
IL 103	9.18	14.77	US 24 near Ripley	US 67/IL 100 near Beardstown	01924-01-011924	current
IL 104	125.91	202.63	US 24/IL 57inQuincy	IL 29inTaylorville	01924-01-011924	current
IL 105	18.33	29.50	—	—	01924-01-011924	01937-01-011937	Meredosia to Quincy; now IL 104
IL 105	37.58	60.48	IL 48inDecatur	I-72inMonticello	01945-01-011945	current
IL 106	18.33	29.50	—	—	01924-01-011924	01933-01-011933	Winchester to Whitehall; became US 36; now 106 again
IL 106	66.47	106.97	I-72/US 36/IL 110 (CKC)inHull	US 67inWhite Hall	01938-01-011938	current
IL 107	23.14	37.24	I-72/US 36/US 54inPittsfield	IL 99inMt. Sterling	01924-01-011924	current
IL 108	54.06	87.00	IL 100inKampsville	I-55inRaymond	01924-01-011924	current
IL 109	8.22	13.23	IL 3inDow	US 67inJerseyville	01924-01-011924	current
IL 110	—	—	—	—	01924-01-011924	01938-01-011938	Jerseyville to Benld
IL 110	—	—	—	—	01938-01-011938	01949-01-011949	Nashville to Freeburg; became US 460
IL 110	328	528	I-72/US 36/MO 110inHull, Illinois	I-90/I-94/I-290inChicago	02010-01-012010	current	Chicago-Kansas City Expressway; Originally Jerseyville to Benld
IL 111	82.18	132.26	Lake Drive in Centreville	IL 104inWaverly	01924-01-011924	current
IL 112	—	—	—	—	01924-01-011924	01964-01-011964	Now IL 159; Originally Royal Lakes to Edwardsville
IL 113	33.95	54.64	IL 47inMazon	IL 17inKankakee	01924-01-011924	current	Formerly 113S
IL 113N	—	—	—	—	01940-01-011940	01961-01-011961	Now IL 102
IL 113S	—	—	—	—	01940-01-011940	01961-01-011961	Now IL 113
IL 114	7.4	11.9	IL 1/IL 17inMomence	SR 10 near Lake Village, Indiana	01924-01-011924	current
IL 115	63.37	101.98	IL 9inElliott	US 45/US 52inKankakee	01924-01-011924	current
IL 116	176.07	283.36	US 34/IL 94inGladstone	US 45inAshkum	01924-01-011924	current
IL 116A	—	—	—	—	01924-01-011924	01994-01-011994	Replaced by IL 117
IL 117	33.85	54.48	I-74inGoodfield	IL 17inToluca	01924-01-011924	current
IL 118	—	—	—	—	01924-01-011924	01933-01-011933	Originally Streator to Pontiac on what is now IL 23
IL 118	—	—	—	—	01935-01-011935	01938-01-011938	Replaced by DuPage CH 7
IL 119	7.78	12.52	US 136/IL 1 west of Alvin	SR 28 east of Alvin	01924-01-011924	current	Originally Heyworth to the Indiana Line north of Danville
IL 119A	—	—	—	—	01924-01-011924	01937-01-011937
IL 120	—	—	—	—	01924-01-011924	01937-01-011937	Havana to Mason City on what is now IL 119
IL 120	34.48	55.49	US 14inWoodstock	IL 131inWaukegan	01941-01-011941	current	Belvidere Road; Formerly IL 20
IL 121	109.48	176.19	IL 130inGreenup	I-55/IL 10inLincoln	01924-01-011924	current	Originally Peoria to Decatur, then to the Indiana line, near Chrisman
IL 122	31.53	50.74	IL 29inGreen Valley	IL 9inDanvers	01924-01-011924	current	Originally Bloomington to Havana
IL 123	33.72	54.27	IL 125inPleasant Plains	I-55inWilliamsville	01924-01-011924	current	Originally Alexander to Athens
IL 124	5.71	9.19	IL 123inWilliamsville	Business I-55inSherman	01924-01-011924	current	Originally Athens to Springfield on what is now IL 29
IL 125	37.1	59.7	US 67/IL 100inBeardstown	IL 97inPleasant Plains	01924-01-011924	current	Originally Springfield to Virginia
IL 126	—	—	—	—	01924-01-011924	01932-01-011932	Springfield to Litchfield; became US 66
IL 126	17.25	27.76	IL 47inYorkville	I-55 near Bolingbrook	01935-01-011935	current	Formerly IL 66; Originally Springfield to Litchfield
IL 127	167.53	269.61	IL 3inTamms	I-55/IL 48inRaymond	01924-01-011924	current
IL 127A	—	—	—	—	01924-01-011924	01937-01-011937	Now IL 143
IL 128	55.57	89.43	I-70inAltamont	IL 121inDalton City	01924-01-011924	current
IL 128A	—	—	—	—	—	01938-01-011938
IL 129	—	—	—	—	01924-01-011924	01936-01-011936	Effingham to Windsor; now IL 32
IL 129	4.06	6.53	IL 113inBraidwood	I-55inWilmington	01960-01-011960	current	Washington Street; Originally Effingham to Windsor on what is now IL 32
IL 130	135.87	218.66	IL 1inGrayville	I-74inUrbana	01924-01-011924	current	Originally Charleston to Albion
IL 130A	5	8.0	—	—	01930-01-011930	01942-01-011942[9]	Newton to Sainte Marie
IL 131	—	—	—	—	01924-01-011924	01937-01-011937	Mattoon to Greenup; now IL 121
IL 131	15.15	24.38	IL 176inLake Bluff	WIS 31 near Pleasant Prairie, Wisconsin	01938-01-011938	current	Green Bay Road
IL 132	—	—	—	—	01924-01-011924	01937-01-011937	Decatur to Mattoon; now IL 121
IL 132	13.57	21.84	IL 59inFox Lake Hills	IL 131inWaukegan	01950-01-011950	current	Grand Avenue
IL 133	52.05	83.77	IL 32inLovington	US 150/IL 1/IL 16inParis	01924-01-011924	current
IL 134	—	—	—	—	01924-01-011924	01933-01-011933	Paris to Indiana; now US 150
IL 134	5.62	9.04	US 12/IL 59inFox Lake	IL 120inHainesville	01950-01-011950	current
IL 135	—	—	—	—	01924-01-011924	01935-01-011935	IL-1 to the Wabash River bridge at Hutsonville
IL 135	20.31	32.69	IL 164inKirkwood	US 67inAlexis	01937-01-011937	current
IL 136	—	—	—	—	01924-01-011924	01935-01-011935	IL-1 to Flat Rock
IL 136	3.22	5.18	Iowa 136inFulton	US 30 east of Fulton	01967-01-011967	current
IL 137	—	—	—	—	01924-01-011924	01935-01-011935	IL-1 to St. Francisville
IL 137	23.49	37.80	IL 83inGrayslake	WIS 32inWinthrop Harbor	01953-01-011953	current	J-Shaped Highway
IL 138	—	—	—	—	01924-01-011924	01937-01-011937	Mt. Carmel to Grayville; replaced by IL-1
IL 138	14.95	24.06	IL 159inBunker Hill	Illinois Street in Mt. Olive	01942-01-011942	current	Originally Mt. Carmel to Grayville
IL 139	—	—	—	—	01924-01-011924	01937-01-011937	Now IL 14; Originally Caramelville to Wabash River Bridge
IL 140	—	—	—	—	01924-01-011924	01937-01-011937	Fairfield to Cave in Rock; replaced by IL-1
IL 140	52.05	83.77	IL 143inAlton	US 40 near Mulberry Grove	01935-01-011935	current	Originally Fairfield to Cave in Rock
IL 141	18.17	29.24	US 45 north of Texas City	SR 62 east of New Haven	01924-01-011924	current
IL 142	55.06	88.61	Calhoun Street in Equality	I-57inMt. Vernon	01924-01-011924	current
IL 142A	—	—	—	—	01924-01-011924	01942-01-011942	Now IL 242; replaced by IL-147
IL 143	—	—	—	—	01924-01-011924	01937-01-011937	Benton to Harrisburg; replaced by IL-34
IL 143	47.96	77.18	US 67inAlton	IL 127inTamalco	01937-01-011937	current	Originally Benton to Harrisburg
IL 144	—	—	—	—	01924-01-011924	01964-01-011964	Now IL 149; Originally Grimsby to Murphysboro
IL 145	43.47	69.96	US 45inMetropolis	US 45/IL 34inHarrisburg	01924-01-011924	current
IL 146	92.93	149.56	MO 34/MO 74inEast Cape Girardeau	IL 1inCave-In-Rock	01924-01-011924	current
IL 147	—	—	—	—	01924-01-011924	01934-01-011934	Marion to Cairo; now IL 37
IL 147	—	—	—	—	01942-01-011942	01946-01-011946	McLeansboro to Wayne City; replaced by IL 142, now IL 242
IL 147	12.81	20.62	IL 146inVienna	IL 145inEddyville	01965-01-011965	current	Originally Marion to Cairo on now what IL 37
IL 148	54.85	88.27	IL 37inPulleys Mill	IL 37/IL 142inMt. Vernon	01924-01-011924	current
IL 149	45.92	73.90	IL 3inGorham	IL 34inThompsonville	01924-01-011924	current	Formerly IL 144
IL 150	24.19	38.93	MO 51inChester	IL 154inCutler	01924-01-011924	current	Originally Cairo to Harmel
IL 151	7.84	12.62	—	—	01924-01-011924	01937-01-011937	replaced by Illinois 43; now Illinois 4
IL 151	7.84	12.62	IL 3inJacob	IL 4inAva	01940-01-011940	current	Originally Steeleville to Murphysboro
IL 152	6.76	10.88	IL 13/IL 127inPyatts	US 51inDu Quoin	01924-01-011924	current
IL 153	18.35	29.53	IL 154inSparta	IL 15inAddieville	01924-01-011924	current	Originally Eden to Irvington
IL 154	63.63	102.40	IL 3/IL 159inRed Bud	IL 37inWhittington	01924-01-011924	current	Originally Pinkeyville to Sunfield
IL 155	10.81	17.40	Fort de Chartres State Historical Site	IL 3inRuma	01924-01-011924	current
IL 156	22.95	36.93	South Meyer Avenue/C Road in Valmeyer	IL 13inNew Athens	01924-01-011924	current
IL 157	33.50	53.91	IL 3inCahokia	IL 140inHamel	01924-01-011924	current
IL 158	25.81	41.54	IL 3inColumbia	I-64/US 50inO'Fallon	01924-01-011924	current
IL 159	64.90	104.45	IL 3/IL 154inRed Bud	IL 16inRoyal Lakes	01924-01-011924	current
IL 160	—	—	—	—	01924-01-011924	01935-01-011935	Alton to Greenville; renumbered IL 140
IL 160	46.06	74.13	IL 15inAddieville	IL 140inAlhambra	01959-01-011959	current	Originally Alton to Greenville
IL 161	67.24	108.21	St. Clair Avenue in Fairview Heights	IL 37inKell	01924-01-011924	current	Originally Carlyle to Belleville
IL 162	—	—	—	—	01924-01-011924	01938-01-011938	Spring Valley to LaMoille; replaced by IL 89
IL 162	16.36	26.33	IL 203inGranite City	US 40inTroy	01954-01-011954	current	Originally Spring Valley to LaMoille
IL 163	—	—	—	—	01924-01-011924	01937-01-011937	IL 1 to Palestine; replaced by IL 33
IL 163	9.89	15.92	IL 158inMillstadt	IL 15inAlorton	01954-01-011954	current	Originally IL 1 to Palestine
IL 164	—	—	—	—	01924-01-011924	01937-01-011937	Pekin to west of Bloomington; replaced by IL 9
IL 164	35.70	57.45	US 34inGladstone	US 34/IL 41/IL 110 (CKC)inGalesburg	01937-01-011937	current	Originally Pekin to west of Bloomington
IL 165	29.64	47.70	IL 9inMerna	IL 47inSibley	01924-01-011924	current
IL 166	14.43	23.22	US 45inNew Burnside	IL 13inPittsburg	01924-01-011924	current
IL 167	12.24	19.70	US 34inWataga	IL 180inVictoria	01924-01-011924	current
IL 168	—	—	—	—	01924-01-011924	01941-01-011941	Now IL 97
IL 169	—	—	—	—	01924-01-011924	01939-01-011939	Shelbyville to Dalton City; replaced by IL 128
IL 169	9.04	14.55	IL 37inKarnak	US 45inNew Columbia	01949-01-011949	current	Originally Shelbyville to Dalton City
IL 170	—	—	—	—	01924-01-011924	01937-01-011937	Red Bud to Sparta; replaced by IL 154
IL 170	25	40	IL 23inCornell	US 6inSeneca	01945-01-011945	current	Formerly IL 70A and IL 186; originally Red Bud to Sparta
IL 171	—	—	—	—	01924-01-011924	01936-01-011936	Thomson to IL 78
IL 171	38.61	62.14	US 6inJoliet	IL 72inChicago	01946-01-011946	current	Formerly IL 4A and IL 213; originally Thomson to IL 78
IL 172	—	—	—	—	01924-01-011924	01936-01-011936	Libertyville to Gurnee; replaced by IL 63 and now is part of IL 21
IL 172	13.06	21.02	IL 92inYorktown	IL 40inTampico	01946-01-011946	current	Originally Libertyville to Gurnee
IL 173	66.20	106.54	IL 251inMachesney Park	IL 137inZion	01924-01-011924	current
IL 174	5.3	8.5	IL 88inPeoria	IL 91 west of Alta	01924-01-011924	01983-01-011983
IL 175	2	3.2	US 24/IL 9 near Glasford	Glasford	01924-01-011924	01935-01-011935
IL 176	41.28	66.43	IL 23inMarengo	IL 131inLake Bluff	01924-01-011924	current	Formerly IL 67
IL 177	47.59	76.59	IL 13/IL 158/IL 159inBelleville	US 51inIrvington	01924-01-011924	current
IL 178	8.49	13.66	Ed Lambert Road in Lowell	I-80inNorth Utica	01924-01-011924	current
IL 179	16.3	26.2	IL 251 near Rutland	IL 18 near Streator	01924-01-011924	01995-01-011995	Part originally IL 45
IL 180	15.43	24.83	US 150inWilliamsfield	IL 17inVictoria	01924-01-011924	current
IL 181	—	—	—	—	01924-01-011924	01948-01-011948	Now IL 33
IL 182	—	—	—	—	01924-01-011924	01941-01-011941	Now IL 161
IL 183	—	—	—	—	01924-01-011924	01984-01-011984	Now IL 154
IL 184	5.87	9.45	IL 149inRoyalton	IL 14inMulkeytown	01924-01-011924	current
IL 185	49.88	80.27	IL 127inTaylor Springs	IL 37inFarina	01924-01-011924	current
IL 186	—	—	—	—	01938-01-011938	01945-01-011945	Now IL 170
IL 190	—	—	—	—	01966-01-011966	01971-01-011971	Renumbered IL 5; now I-88
IL 192	8.31	13.37	IL 92inIllinois City	IL 94inTaylor Ridge	01955-01-011955	current
IL 194	16.7	26.9	I-90/IL 53inRolling Meadows	I-94inChicago	01960-01-011960	01978-01-011978	Now I-90/I-94 in Chicago
IL 199	—	—	—	—	01969-01-011969	01980-01-011980	Now IL 92
IL 203	9.51	15.30	Collinsville Road in Fairmont City	I-270inGranite City	01964-01-011964	current
IL 213	—	—	—	—	—	01946-01-011946	Now IL 171
IL 226	—	—	—	—	—	01946-01-011946	Replaced by IL 172
IL 242	18.67	30.05	IL 142inMcLeansboro	IL 15inWayne City	01924-01-011924	current	Formerly IL 142A
IL 250	33.44	53.82	US 50inNoble	Business US 50inLawrenceville	01965-01-011965	current
IL 251	135.32	217.78	I-39/US 51inHudson	US 51/IL 75inSouth Beloit	01982-01-011982	current	Formerly US 51 in North Central Illinois
IL 255	23.3	37.5	I-255/I-270inPontoon Beach	US 67inGodfrey	01998-01-011998	current	Alton Bypass
IL 267	59	95	US 67/IL 111inGodfrey	Business I-72/Business US 67/IL 104inJacksonville	01965-01-011965	current
IL 316	—	—	—	—	—	01981-01-011981	Now part of IL 16
IL 336	80	130	I-172/US 24/IL 110 (CKC)inQuincy	US 136/IL 110 (CKC)inMacomb	01990-01-011990	current
IL 351	8.55	13.76	IL 71/IL 251inOglesby	I-80inLaSalle	01966-01-011966	current	Formerly Business US 51 in LaSalle
IL 390 Toll	9.80	15.77	US 20inHanover Park	IL 83inBensenville	02013-01-012013	current	Formerly the Elgin–O'Hare Expressway
IL 394	14.63	23.54	IL 1 near Beecher	I-80/I-94/I-294inSouth Holland	01956-01-011956	current
IL 594	3.07	4.94	O'Hare International AirportinChicago	IL 194 in Chicago	01971-01-011971	01978-01-011978	Now I-190
Former

Inventory routes[edit]

Illinois uses unique "inventory number" signage on rural roads that are owned or maintained by IDOT but may or may not be part of the US or Illinois highway systems. These number signs are white squares, with a green divided circle. The county name is within the dividing line, the mileage from the county line is in the lower half and the inventory or route number in the upper. Number series vary between IDOT Districts, in some areas the number used on otherwise unnumbered routes are a derivative of the former number (i.e.: "913" used on a section of former IL 13) or a sequential number unrelated to the original or former number (such as the 8900 series numbers used in the Galesburg–Macomb area). On many US and Illinois Routes the posted number is used, with or without a preceding descriptor. These signs are not intended for navigation as route numbers are but rather as guides for IDOT crews and contractors and to identify specific intersections, culverts or other features.^[10]

See also[edit]

• Illinois portal
• U.S. Roads portal

References[edit]

External links[edit]

• http://www.n9jig.com/ Illinois Highways Page]