Jefferson Township is one of ten townships in Newton County, Indiana. As of the 2020 census, its population was 1,987 and it contained 947 housing units.
Jefferson Township was established in 1860.
According to the 2010 census, the township has a total area of , all land.
(This list is based on USGS data and may include former settlements.)
Jefferson Township is served by the Kentland-Jefferson Township Public Library.