Washington Township is one of fifteen townships in Greene County, Indiana, USA. As of the 2010 census, its population was 1,017, down from 1,186 at 2010.
According to the 2010 census, the township has a total area of , of which (or 99.02%) is land and (or 0.98%) is water. Lakes in this township include Long Pond. The stream of Fourmile Creek runs through this township.
(This list is based on USGS data and may include former settlements.)
The township contains two cemeteries: Bogard and Mount Zion (Dog Island) and Marco.