Washington Township is one of the twelve townships in Adams County, Indiana.

[2] As of the 2020 census, its population was 8,654, down from 10,151 at the 2010 census.

[3] According to the 2010 census, the township has a total area of 37.52 square miles (97.2 km2), of which 37.49 square miles (97.1 km2) (or 99.92%) is land and 0.04 square miles (0.10 km2) (or 0.11%) is water.

[4] The township contains the following cemeteries: Antioch (also known as Beery or River Brethren), County Home (or Farm or Infirmary- no longer exists), Greenwood (also known as Decatur or Maplewood), First City (no longer exists), Little Family, and Roe (no longer exists).