Ohio Township is one of ten townships in Warrick County, Indiana, United States. As of the 2010 census, its population was 37,749 and it contained 14,922 housing units. It contains 63% of Warrick County's population. It has the third largest township population in Southwestern Indiana, behind two townships in Vanderburgh County and is one of the fastest-growing townships in Indiana. Ohio Township population grew 21.8% from the 2000 census to the 2010 census. Unlike most townships in Indiana, Ohio Township has two incorporated towns within its jurisdiction, Newburgh and Chandler.

Warrick County is a county located in the U.S. state of Indiana. As of 2020, the population was 63,898. The county seat is Boonville. It was organized in 1813 and was named for Captain Jacob Warrick, an Indiana militia company commander killed in the Battle of Tippecanoe in 1811. It is one of the ten fastest-growing counties in Indiana.