Washington Township is one of seventeen townships in Kosciusko County, Indiana. As of the 2020 census, its population was 3,025 (up from 2,996 at 2010) and it contained 1,344 housing units.
Washington Township was organized in 1838.
The Robert Orr Polygonal Barn was listed on the National Register of Historic Places in 1993.
According to the 2010 census, the township has a total area of , of which (or 98.39%) is land and (or 1.64%) is water.
(This list is based on USGS data and may include former settlements.)
Washington Township residents are served by the Pierceton & Washington Township Public Library in Pierceton.