Olive Township is one of thirteen townships in St. Joseph County, in the U.S. state of Indiana. As of the 2020 census, its population was 4,364.
Olive Township was organized in 1830 and was named after Olive Stanton Vail, an early settler.
According to the United States Census Bureau, Olive Township covers an area of ; of this, (99.81 percent) is land and (0.19 percent) is water.
(This list is based on USGS data and may include former settlements.)
The township contains Olive Chapel Cemetery.
Olive Township was formed in 1830. The township was named for Olive Stanton Vail, the wife of an early settler.
The Haven Hubbard Home and Studebaker Clubhouse and Tree Sign are listed on the National Register of Historic Places.
Olive Township is served by the New Carlisle-Olive Township Public Library.