Alledonia, Ohio
Alledonia is an unincorporated community in central Washington Township, Belmont County, Ohio, United States. Although it is unincorporated, it has a post office, with the ZIP code of 43902. It lies along State Route 148.
Alledonia is part of the Wheeling, WV-OH Metropolitan Statistical Area.
Coordinates: 39°53′55″N 80°58′09″W / 39.89861°N 80.96917°W
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