Pottersburg (originally known as Pottersburgh) is an unincorporated community in Allen Township, Union County, Ohio, United States. It is located at 40°15′58″N 83°30′03″W / 40.26611°N 83.50083°W, along U.S. Route 33 between Marysville and Bellefountaine, about four miles west of Marysville.