Washington Township is one of twelve townships in Clark County, Indiana. As of the 2010 census, its population was 1,702 and it contained 744 housing units.
Washington Township was organized in 1816.
According to the 2010 census, the township has a total area of , of which (or 99.72%) is land and (or 0.26%) is water.
The township contains several cemeteries: Adams (a.k.a. Fifer), Barnes, Barnes Community House, Britain Cemetery (a.k.a. Pisgah), Crown Hill, Fouts/Robison, Frazier Family, Glass Family, Grayfriar-McMillen, Lawrence, Izzard, New Washington Christian Church, Staples, Work (a.k.a. Bower-Work Henly-Work)