Sewellsville is an unincorporated community in Belmont County, in the U.S. state of Ohio.
[1] The first settlement at Sewellsville, then called Union, was made around 1815.
[2] A post office called Sewellsville was established in 1834, and remained in operation until 1907.
[3] The present name honors Peter Sewell, the first postmaster.
This Belmont County, Ohio state location article is a stub.