Dundee Township occupies the 6-mile (9.7 km) square in the Northeast corner of Kane County, Illinois.

It includes West and East Dundee, Carpentersville, Sleepy Hollow, Gilberts and portions of Elgin, Barrington Hills, and Algonquin.

[4] Historically, industry and residential areas straddled the river, with most of the land on the western half of the township devoted to agriculture.

[3] It is located at 42.111813 N, 88.286978 W. A small portion of the village of Hoffman Estates was formerly in this township until it was de-annexed in 2022.

The Township Office is located at 611 E. Main Street, Suite 201 East Dundee, IL.