Washington Township is one of twelve townships in Hendricks County, Indiana, United States.

[3] The John W. McClain House, A.A. Parsons Farmstead, and Smith Farm are listed on the National Register of Historic Places.

[4][5] Washington Township covers an area of 38.68 square miles (100.2 km2); of this, 0.03 square miles (0.078 km2) or 0.09 percent is water.

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

The township contains twelve cemeteries: Abner Creek, Barlow, Gossett, McClain, Merritt, Merritt Memorial Gardens, North Lawn, Salem Baptist, Shiloh Baptist, Shiloh Methodist, Smith and White Lick Presbyterian.