 Illinois Route 21 | ||||
|---|---|---|---|---|
| Milwaukee Avenue Riverside Drive | ||||
 IL 21 highlighted in red | ||||
| Route information | ||||
| Maintained by IDOT | ||||
| Length | 28.13 mi[1] (45.27 km) | |||
| Existed | November 5, 1918[2]–present | |||
| Major junctions | ||||
| South end |  IL 43 in Niles | |||
 US 14 in Niles US 45 in Prospect Heights US 45 in Lincolnshire  I-94 Toll in Gurnee | ||||
| North end |  US 41 in Gurnee | |||
| Location | ||||
| Country | United States | |||
| State | Illinois | |||
| Counties | Cook, Lake | |||
| Highway system | ||||
| ||||
Illinois Route 21 (IL 21) is an arterial north–south state highway in northeastern Illinois. It runs from Illinois Route 43 (Harlem Avenue) in Niles to U.S. Route 41 (Skokie Highway) north of Gurnee. Illinois 21 is 28.13 miles (45.27 km) long.[1]
Along most of its length, Illinois 21 is called Milwaukee Avenue. North of Gurnee, it is called Riverside Drive.
- ^ a b Illinois Technology Transfer Center. T2 GIS Data. Retrieved April 7, 2006. As documented in Wikipedia:WikiProject U.S. Roads/Lengths/Illinois.
- ^ Carlson, Rick. Illinois State Highways: Routes 21 through 40. Last updated March 15, 2006. Retrieved March 22, 2006.