Jefferson Township is one of fourteen townships in Miami County, Indiana, United States. As of the 2020 census, its population was 2,419 (slightly up from 2,412 at 2010) and it contained 1,029 housing units.
Jefferson Township was organized in 1834. It is 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 98.80%) is land and (or 1.20%) is water.
The township contains these five cemeteries: Courter, Eel River Chapel, Green Lawn, Koontz and Westlawn.