Fifteen is an unincorporated community in Washington County, in the U.S. state of Ohio.
A variant name is Fifteen Mile.
[1] The community was so named on account of its location, 15 miles (24 km) from Marietta.
[2] A post office called Fifteen was established in 1872, and remained in operation until 1918.
This Washington County, Ohio state location article is a stub.