Jackson Township is one of thirteen townships in Washington County, Indiana, United States.

As of the 2020 census, its population was 2,019 and it contained 832 housing units.

[1] According to the 2010 census, the township has a total area of 25.48 square miles (66.0 km2), of which 25.39 square miles (65.8 km2) (or 99.65%) is land and 0.09 square miles (0.23 km2) (or 0.35%) is water.

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

The township contains four cemeteries: Goss, Hiestand, Martinsburg and Rickerd.