Clay Township is one of thirteen townships in Owen County, Indiana, United States. As of the 2020 census, its population was 2,566 (down from 2,600 at 2010) and it contained 1,134 housing units.
Clay Township was named for Kentucky statesman Henry Clay.
The Ennis Archaeological Site was listed on the National Register of Historic Places in 1985.
According to the 2010 census, the township has a total area of , all land.
(This list is based on USGS data and may include former settlements.)
The township contains five cemeteries: Brown, Gross, Hopewell, Livingston, and Moreland.