Hannibal, Ohio

Hannibal is a census-designated place in eastern Ohio Township, Monroe County, Ohio, United States. Although it is unincorporated, it has a post office, with the ZIP code of 43931. As of the 2016 estimate, it had a population of 451.Hannibal lies along Ohio State Route 7 near an intersection with Ohio State Route 536. An Ohio River town, it is home to the Hannibal Locks and Dam. The town lies below Powhatan Point and above Sardis. Hannibal is also connected to New Martinsville, West Virginia via the New Martinsville Bridge. Hannibal is home to River High School (Hannibal, Ohio)GeographyHannibal is located at . According to the United States Census Bureau, the CDP has a total area of 2.9km2, all of it land.