Marion Township is one of thirteen townships in Putnam County, Indiana. As of the 2020 census, its population was 1,890 (up from 1,794 at 2010) and it contained 790 housing units.
According to the 2010 census, the township has a total area of , of which (or 99.91%) is land and (or 0.09%) is water.
(This list is based on USGS data and may include former settlements.)