Seward Township is one of seventeen townships in Kosciusko County, Indiana, United States. As of the 2020 census, its population was 2,280 (down from 2,567 at 2010) and it contained 1,357 housing units.
Seward Township was organized in 1859.
According to the 2010 census, the township has a total area of , of which (or 96.44%) is land and (or 3.58%) is water.