Dundee Township is located in the U.S. state of Illinois. It is within Kane County including West and East Dundee, Carpentersville, Sleepy Hollow, Gilberts and portions of Elgin, Barrington Hills, Hoffman Estates, and Algonquin. It has a total area of 35.96 square miles at 42°06′32″N 088°17′51″W. The elevation is 817 feet above sea level. As of the 2010 census data, it had a total population of 64,167.