Jefferson Township is one of thirteen townships in Henry County, Indiana, United States. As of the 2010 census, its population was 1,504 and it contained 615 housing units.
Jefferson Township was organized in 1843.
According to the 2010 census, the township has a total area of , of which (or 99.79%) is land and (or 0.21%) is water. The streams of Bethel Brook, Gander Run, Lake Branch and Sulphur Drain run through this township.
The township contains two cemeteries: Bethel and Sharp.