Montgomery Township is one of eleven townships in Jennings County, Indiana, USA. As of the 2020 census, its population was 950 (down from 978 at 2010) and it contained 416 housing units.
According to the 2010 census, the township has a total area of , of which (or 99.90%) is land and (or 0.05%) is water. The streams of Bear Creek, Davis Branch and Little Bear Creek run through this township.
The township contains one cemetery, Hopewell.