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United States Numbered Highway System in Illinois
United States Numbered Highway System in Illinois
	Standard Illinois U.S. Highway markers
System information
	Maintained by IDOT, ISTHA, and CDOT
Formed	November 11, 1926
Highway names
Interstates	Interstate X (I-X)
US Highways	U.S. Route X (US X)
State	Illinois Route X (IL X)
System links
	Illinois State Highway System; Interstate; US; State; Tollways; Scenic;

This is a list of U.S. Highways in Illinois, all of which are owned and maintained by the U.S. state of Illinois. The Illinois Department of Transportation (IDOT) is responsible for maintaining the U.S Highways in Illinois. The system in Illinois consists of 20 primary highways.

Mainline highways


Number	Length (mi)^[2]	Length (km)	Southern or western terminus	Northern or eastern terminus	Formed	Removed	Notes
US 6	179.88	289.49	I-74/US 6 in Moline	I-80/I-94/US 6 in Lansing	01932-01-011932	current	Grand Army of the Republic Highway
US 12	85.14	137.02	US 12 near Richmond	US 12/US 20/US 41 in Chicago	01928-01-011928	current
US 14	69.55	111.93	US 14 near Harvard	US 41 in Chicago	01933-01-011933	current	Ronald Reagan Highway / Northwest Highway
US 20	233.93	376.47	US 20 in East Dubuque	US 12/US 20/US 41 in Chicago	01926-01-011926	current	Ulysses S. Grant Memorial Highway
US 24	255.13	410.59	US 24 in Quincy	US 24/US 52 in Sheldon	01926-01-011926	current
US 30	153.79	247.50	US 30 in Fulton	US 30 in Lynwood	01926-01-011926	current
US 32	—	—	US 6 at Moline	US 41 in Chicago	01926-01-011926	01934-01-011934	Now US 6 and US 34
US 34	211.37	340.17	US 34 in Gladstone	IL 43 in Berwyn	01926-01-011926	current	Walter Payton Memorial Highway
US 36	216.47	348.37	I-72/US 36/Route 110 in Hull	US 36 in Chrisman	01926-01-011926	current
US 40	159.99	257.48	I-55/I-64/US 40 in East St. Louis	I-70/US 40 near Marshall	01926-01-011926	current	National Road
US 41	64.81	104.30	US 12/US 20/US 41 in Chicago	I-94/US 41 near Russell	01926-01-011926	current	Brian Piccolo Memorial Highway
US 45	428.99	690.39	US 45 near Brookport	US 45 near Antioch	01926-01-011926	current
US 50	165.79	266.81	I-255/US 50 in Columbia	US 50 in Lawrenceville	01926-01-011926	current
US 51	415.95	669.41	US 51/US 60/US 62 at Cairo	US 51 in South Beloit	01926-01-011926	current
US 52	216	348	US 52/Iowa 64 in Savanna	US 24/US 52 in Sheldon	01926-01-011926	current
US 54	23.96	38.56	US 54 near Pittsfield	I-72/US 36 near Pittsfield	01926-01-011926	current
US 60	0.92	1.48	US 60/US 62 at Cairo	US 51/US 60/US 62 at Cairo	01926-01-011926	current	Concurrent with US 62
US 61	2.42	3.89	US 61/US 151 at East Dubuque	US 61/US 151 at East Dubuque	01971-01-011971	01982-01-011982	Concurrent with US 151
US 62	0.92	1.48	US 60/US 62 at Cairo	US 51/US 60/US 62 at Cairo	01926-01-011926	current	Concurrent with US 60
US 66	301	484	US 66 at East St. Louis	US 41 in Chicago	01926-01-011926	01974-01-011974	Will Rogers Highway / Mother Road
US 67	213.99	344.38	US 67 in Alton	US 67 in Rock Island	01926-01-011926	current
US 124	80	130	—	—	01926-01-011926	01938-01-011938
US 136	225.95	363.63	US 136 at Hamilton	US 136 at Danville	01926-01-011926	current
US 150	267.47	430.45	US 6 at Moline	US 150 near Paris	01926-01-011926	current
US 151	2.42	3.89	US 61/US 151 at East Dubuque	US 61/US 151 at East Dubuque	01971-01-011971	01982-01-011982	Concurrent with US 61
US 330	—	—	—	—	01926-01-011926	01942-01-011942	Replaced by US 30 Alt.; part of it is now IL 38
US 430	—	—	—	—	01926-01-011926	01934-01-011934	Replaced by US 330; now part of IL 31
US 460	—	—	—	—	01947-01-011947	01974-01-011974	Replaced by I-64
Former

Special routes


Number	Length (mi)	Length (km)	Southern or western terminus	Northern or eastern terminus	Formed	Removed	Notes
Temp. US 6	—	—	Moline	Joliet	—	—
US 6 Bus.	—	—	Lansing	Illinois–Indiana state line	—	—
City US 12	—	—	—	—	01938-01-011938	01960-01-011960	Served Chicago
US 12 Bus.	—	—	—	—	01960-01-011960	01968-01-011968	Served Chicago
US 20 Bus.	—	—	—	—	01988-01-011988	current	Serves Freeport
US 20 Bus.	—	—	Winnebago	Belvidere	01926-01-011926	current	State Street; Serves Rockford
US 20 Bus.	—	—	—	—	01962-01-011962	01984-01-011984	Served Elgin
US 20 Bus.	—	—	—	—	01938-01-011938	01968-01-011968	Serves Chicago; Formerly designated as City US Route 20
City US 30	—	—	—	—	01959-01-011959	01960-01-011960	Served Aurora
US 30 Bus.	—	—	—	—	01960-01-011960	01970-01-011970	Served Aurora; Formerly designated as City US Route 30
US 30 Toll	—	—	Aurora	Ford Heights	—	—
US 30 Alt.	—	—	—	—	01942-01-011942	01971-01-011971	Served Chicago; Formerly designated as US Route 330
US 40 Alt.	—	—	—	—	01948-01-011948	01967-01-011967	Served Greenville-Vandalia
US 40 Byp.	—	—	Chain of Rocks Bridge	US 40 in Troy	01938-01-011938	01965-01-011965	Served the Greater St. Louis Area
Temp. US 41	—	—	Lincolnwood	Skokie	—	—
Temp. US 41	—	—	Highland Park	Del Mar Woods	—	—
US 41 Toll	—	—	Lansing	Antioch	—	—
US 45 Byp.	—	—	—	—	—	—	Served Norris City
US 50 Byp.	—	—	—	—	01955-01-011955	01975-01-011975	Serves the Greater St. Louis Area; replaced by I-255 as well as mainline US 50
US 50 Bus.	—	—	—	—	01962-01-011962	current	Serves Lawrenceville
US 51 Bus.	—	—	—	—	—	—	Serves Elwin-Decatur
US 51 Bus.	—	—	—	—	01926-01-011926	current	Serves Clinton
US 51 Bus.	—	—	—	—	01926-01-011926	current	Serves Bloomington-Normal
US 51 Bus.	—	—	—	—	—	—	Serves LaSalle, Illinois
US 54 Bus.	6	9.7	—	—	01959-01-011959	01969-01-011969	Serves Kankakee
US 66 Byp.	—	—	Chain of Rocks Bridge	US 66/IL 140 in Hamel	01957-01-011957	—	Served the Greater St. Louis Area
City US 66	—	—	—	—	—	01957-01-011957	Served the Greater St. Louis Area
US 66 Bus.	—	—	—	—	—	—	Served East St. Louis
US 66 Bus.	—	—	—	—	—	—	Served Springfield
US 66 Bus.	—	—	—	—	—	—	Served Lincoln
US 66 Bus.	—	—	—	—	—	—	Served Bloomington
US 66 Alt.	40	64	—	—	—	—	Served Joliet
US 67 Alt.	—	—	—	—	01953-01-011953	01965-01-011965
US 67 Alt.	—	—	—	—	01939-01-011939	01964-01-011964	Served the Greater St. Louis Area
US 150 Bus.	—	—	—	—	—	—	Served Peoria
City US 150	—	—	—	—	—	—	Served Peoria
US 150 Bus.	—	—	—	—	—	—	Served Champaign
Temp. US 150	—	—	Ogden	Paris	—	—
US 460 Alt.	—	—	—	—	—	—	Served Mount Vernon
Former

References

^ McNichol, Dan (2006). The Roads that Built America. New York: Sterling. p. 74. ISBN 1-4027-3468-9.
^ Illinois Technology Transfer Center (2007). "T2 GIS Data". Illinois Department of Transportation. Archived from the original on August 10, 2007. Retrieved November 8, 2007.