Warren Township is one of thirteen townships in Putnam County, Indiana. As of the 2020 census, its population was 3,408 (down from 3,929 at 2010[3]) and it contained 552 housing units.[4]
According to the 2010 census, the township has a total area of 29.02 square miles (75.2 km2), of which 28.98 square miles (75.1 km2) (or 99.86%) is land and 0.04 square miles (0.10 km2) (or 0.14%) is water.[3]