Delaware Township is one of eleven townships in Ripley County, Indiana. As of the 2020 census, its population was 1,513 (up from 1,437 at 2010) and it contained 606 housing units.
According to the 2010 census, the township has a total area of , of which (or 99.82%) is land and (or 0.18%) is water.
Delaware Township residents may obtain a free library card from the Osgood Public Library Central Library in Osgood, or its branch in Milan.