Costonia is an unincorporated community in Jefferson County, in the U.S. state of Ohio.[1]
A post office called Costonia was established in 1897, and remained in operation until 1937.[2] Besides the post office, Costonia had a country store.[3]
Municipalities and communities of Jefferson County, Ohio, United States | ||
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Footnotes | ‡This populated place also has portions in an adjacent county or counties | |
40°25′37″N 80°37′04″W / 40.42694°N 80.61778°W / 40.42694; -80.61778