Washington Township is one of fourteen townships in Miami County, Indiana, United States. As of the 2020 census, its population was 3,365 (down from 3,493 at 2010) and it contained 1,563 housing units.
The first settler, Thomas Henton, arrived in Washington Township in 1838 and built a cabin upon a hill.
Washington Township was organized in 1843. It was named for President George Washington.
According to the 2010 census, the township has a total area of , of which (or 99.08%) is land and (or 0.92%) is water. The Wabash River defines the township's northern border.
(This list is based on USGS data and may include former settlements.)
The township contains these four cemeteries: Crider, Rankin, Salem and Sharpee.