Liberty Township is one of the fourteen townships of Union County, Ohio, United States. The 2020 census found 2,048 people in the township.

Union County is a county located in the U.S. state of Ohio. As of the 2020 census, the population was 62,784. Its county seat is Marysville. Its name is reflective of its origins, it being the union of portions of Franklin, Delaware, Madison, and Logan counties.