Rock Creek Township is one of fourteen townships in Carroll County, Indiana. As of the 2020 census, its population was 447 (down from 475 at 2010) and it contained 186 housing units.
Rock Creek Township was organized in 1828.
District School No. 3 at Rockfield was listed on the National Register of Historic Places in 1988.
According to the 2010 census, the township has a total area of , of which (or 97.90%) is land and (or 2.10%) is water.
The township contains four cemeteries: Brown, Independent Order of Odd Fellows, Mullendore and Parks.
Rock Creek Township residents may obtain a library card at the Delphi Public Library in Delphi.