Preble Township is one of twelve townships in Adams County, Indiana. As of the 2020 census, its population was 1,037, down from 1,069 at the 2010 census.
According to the 2010 census, the township has a total area of , of which (or 99.62%) is land and (or 0.33%) is water.
The township contains the following cemeteries: Fuhrman (abandoned), Magley (also known as Salem or UCC), Mann, St. John Lutheran (Bingen), St. Paul Lutheran, and Zion Lutheran (Friedheim).