Clear Lake Township is one of twelve townships in Steuben County, Indiana, United States. As of the 2020 census, its population was 818, up from 799 at 2010, and it contained 912 housing units. It is the north easternmost township in the state.
William L. Lords House was listed on the National Register of Historic Places in 1983.
According to the 2010 census, the township has a total area of , of which (or 86.13%) is land and (or 13.87%) is water. Lakes in this township include Clear Lake, Handy Lake, Lake Anne, Long Lake, Mirror Lake, Mud Lake, and Round Lake.
The township contains three cemeteries: Teeters, Clear Lake Baptist, and Clear Lake Lutheran.
Clear Lake Township residents may obtain a free library card from the Fremont Public Library.