Jackson Township is one of four townships in Brown County, Indiana. As of the 2020 census, its population was 3,938 (down from 4,002 at 2010) and it contained 2,154 housing units.
Jackson Township was named for Andrew Jackson.
According to the 2010 census, the township has a total area of , of which (or 98.41%) is land and (or 1.59%) is water.
(This list is based on USGS data and may include former settlements.)
The township contains two cemeteries: Georgetown and Lanam.