Fly is an unincorporated community in Monroe County, in the U.S. state of Ohio.
A post office called Fly was established in 1886, and remained in operation until 1995. The origin of the name "Fly" is obscure. It is said that the townspeople selected the name Fly on account of its brevity.
Coordinates: 39°33′53″N 81°00′30″W / 39.56472°N 81.00833°W