Jefferson Township is one of thirteen townships in Washington County, Indiana, United States. As of the 2020 census, its population was 830.
According to the 2010 census, the township has a total area of , of which (or 98.69%) is land and (or 1.31%) is water.
(This list is based on USGS data and may include former settlements.)
The township contains these four cemeteries: Covenanter, Pollock, Thompson and Wheeler.