Washington Township is one of fourteen townships in Morgan County, Indiana, United States. As of the 2010 census, its population was 17,073 and it contained 7,171 housing units.[2] The township contains a portion of the Morgan–Monroe State Forest.
According to the 2010 census, the township has a total area of 59.03 square miles (152.9 km2), of which 57.51 square miles (149.0 km2) (or 97.43%) is land and 1.51 square miles (3.9 km2) (or 2.56%) is water.[2] The White River defines the township's north border.