Brownstown Township is one of twelve townships in Jackson County, Indiana, United States.

At the 2020 census, its population was 5,664 and it contained 2,318 housing units.

[3] Shields' Mill Covered Bridge was listed on the National Register of Historic Places in 2016.

[4] According to the 2010 census, the township has a total area of 63.62 square miles (164.8 km2), of which 62.72 square miles (162.4 km2) (or 98.59%) is land and 0.9 square miles (2.3 km2) (or 1.41%) is water.

The township contains ten cemeteries: Burrell, Durland, First German Presbyterian, Miller, Robertson, Saint Pauls, Smallwood, Wayman, Weathers and Woodmansee.