Liberty Township is one of nine townships in Crawford County, Indiana. As of the 2020 census, its population was 1,968 and it contained 891 housing units.
The William Proctor House was listed on the National Register of Historic Places in 2013.
According to the 2010 census, the township has a total area of , all land.
The township contains four cemeteries: Marengo, Marengo New Section, Marengo Old Section and White.