Deer Creek Township is one of fourteen townships in Cass County, Indiana. As of the 2020 census, its population was 897 (down from 912 at 2010) and contained 374 housing units.
Deer Creek Township was organized in 1842. Deer Creek Township was named from Deer Creek, which was named from herds of wild deer that were often seen near its banks.
According to the 2010 census, the township has a total area of , all land.
The township contains three cemeteries: Harness, Hoover-Snider and Miller.