Richland Township is one of eleven townships in Benton County, Indiana. As of the 2020 census, its population was 562 and it contained 258 housing units. Its name is a "reference to the rich land within its borders."
According to the 2020 census, the township has a total area of , of which (or 99.92%) is land and (or 0.08%) is water.
The township contains three cemeteries: Dehner, Earl Park and Saint John.