Jefferson Township is one of twelve townships in Pulaski County, Indiana, United States. As of the 2020 census, its population was 490 and it contained 228 housing units.
Jefferson Township was organized in 1851, and named after Thomas Jefferson, third President of the United States.
According to the 2010 census, the township has a total area of , all land.
The township contains these three cemeteries: Burroughs, Idle and Koster.
Jefferson Township residents may obtain a free library card from the Pulaski County Public Library in Winamac.