Jackson Township is one of nine townships in Spencer County, Indiana. As of the 2010 census, its population was 803 and it contained 353 housing units. Jackson Township contains the city of Gentryville.
Jackson Township was organized in 1841, and named for Andrew Jackson (1767âÂÂ1845), the 7th President of the United States.
Colonel William Jones House was listed on the National Register of Historic Places in 1975.
According to the 2010 census, the township has a total area of , of which (or 98.83%) is land and (or 1.17%) is water.