Franklin Square is an unincorporated community in Columbiana County, in the U.S. state of Ohio.
A post office called Franklin Square was established in 1830, and remained in operation until 1914. Besides the post office, Franklin Square had several shops, a church and schoolhouse.
Coordinates: 40°51′22″N 80°47′30″W / 40.85611°N 80.79167°W