Warren Township is one of fourteen townships in Clinton County, Indiana, United States. As of the 2020 census, its population was 596 (down from 619 at 2010) and it contained 255 housing units.
Originally part of Jackson Township, Warren was made a separate township in 1834. The first settler in the area was A. F. Whiteman who located on Section 23 in 1830.
The John Young House was listed on the National Register of Historic Places in 1994.
According to the 2010 census, the township has a total area of , all land.
The township contains six cemeteries: Campbell, Grays, Old Liberty, Old Prophet, Sims and Veneman.