Pierce Township is one of thirteen townships in Washington County, Indiana, United States. As of the 2020 census, its population was 2,504 and it contained 1,142 housing units.
Pierce Township was organized in 1853. It was named for President Franklin Pierce.
According to the 2010 census, the township has a total area of , of which (or 99.66%) is land and (or 0.34%) is water.
(This list is based on USGS data and may include former settlements.)
The township contains these four cemeteries: Blue River Church, Mount Pleasant Church, Old Blue River and Wilson.