Illinois Route 21
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.
Illinois Route 21 | ||||
|---|---|---|---|---|
| Milwaukee Avenue Riverside Drive | ||||
IL 21 highlighted in red | ||||
| Route information | ||||
| Maintained by IDOT | ||||
| Length | 28.13 mi (45.27 km) | |||
| Existed | November 5, 1918–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 | ||||
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Along most of its length, Illinois 21 is called Milwaukee Avenue. North of Gurnee, it is called Riverside Drive.
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