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[3]) and it contained 2,154 housing units.

[6] According to the 2010 census, the township has a total area of 62.38 square miles (161.6 km2), of which 61.39 square miles (159.0 km2) (or 98.41%) is land and 0.99 square miles (2.6 km2) (or 1.59%) is water.

[3] (This list is based on USGS data and may include former settlements.)

The township contains two cemeteries: Georgetown and Lanam.