Benton Township is a township in Lake County, Illinois, United States, and includes all of the village of Winthrop Harbor, most of the village of Beach Park, and small portions of the cities of Zion and Waukegan.

Benton Township covers an area of 14.9 square miles (38.5 km2); of this, 0.27 square miles (0.7 km2) or 1.92 percent is water.

[2] Lakes in this township include Sand Pond.

The streams of Bull Creek and Dead River run through this township.

The township contains nine cemeteries: Benton Greenwood, Briggs Family, Buffalo Grove Catholic, Catholic, Colchester, County Line, Cranberry Lake, Pineview and Rosecrans.