Illinois Route 68 (IL 68) is a 25.74-mile-long (41.42 km) east–west state highway in the northeastern part of the U.S. state of Illinois.

It travels east from IL 72 (Higgins Road) in the Dundee area to the concurrency of Interstate 94 (I-94)/U.S.

Route 41 (US 41) (Edens Expressway) in Glencoe.

The towns are named after Dundee, Scotland, the hometown of a young settler who won the naming rights in a competition.

State Bond Issue (SBI) Route 68 originally traveled from Lake Bluff to the Wisconsin state line on what is now IL 131 and US 41.