Roads of the Mid-South & West > Highways of the State of Illinois > Illinois State Route 1-50 > Illinois State Route 21 > Illinois State Route 21, Cook County

Illinois State Route 21
Cook County

Illinois State Route 21 is a north-south highway. This runs in North-Central Cook County.

IL St Rt 21 passes through the following towns in Cook County.

Prospect Heights

Mount Prospect

IL St Rt 21 is multi-plexed in Cook County.
U.S. Rt. 45, from Wheeling to Prospect Heights.

IL St Rt 21 crosses the following highways in Cook County.
Illinois State Route 68, at Wheeling.
U.S. Rt. 45, near Prospect Heights.
Interstate 294, (Tri-State Tollway) at Glenview. (NO INTERCHANGE)
Illinois State Route 58, at Niles.
U.S. Rt. 14, at Niles.
Illinois State Route 43, at Niles.

A begin marker on NB IL St Rt 21.

A junction marker on NB IL St Rt 43.

SB IL St Rt 21 in Niles.

A guide marker on EB U.S. Rt. 14.

A junction marker on EB IL St Rt 68.

NB U.S. Rt. 45/IL St Rt 21 in Wheeling.

3 June 2010