Clay Township is one of the 17 townships in Kosciusko County, Indiana, United States. As of the 2020 census, its population was 1,657, a decrease from 1,712 at 2010 and it contained 753 housing units.
According to the 2010 census, the township has a total area of , of which (or 97.65%) is land and (or 2.35%) is water.
(This list is based on USGS data and may include former settlements.)