Clay Township is one of fourteen townships in Dearborn County, Indiana. As of the 2010 census, its population was 2,966 and it contained 1,271 housing units.
Clay Township was organized in 1835.
According to the 2010 census, the township has a total area of , of which (or 99.80%) is land and (or 0.20%) is water.
The township contains four cemeteries: Conaway, Oakdale, Spangler and Windsor.
Clay Township residents may obtain a library card at the Aurora Public Library in Aurora.