Jefferson Township is one of thirteen townships in Owen County, Indiana, United States. As of the 2020 census, its population was 998 (down from 1,129 at 2010) and it contained 478 housing units.
Jefferson Township was organized in 1828. It was named for Thomas Jefferson, third President of the United States.
According to the 2010 census, the township has a total area of , of which (or 99.71%) is land and (or 0.27%) is water.
(This list is based on USGS data and may include former settlements.)
The township contains these six cemeteries: Bush, Fiscus, Little John, Neihart, Shouse and Winters.