Stewart is an unincorporated community in central Rome Township, Athens County, Ohio, United States. As of the 2010 census it had a population of 247. Although it is unincorporated, it has a post office, with the ZIP code of 45778.
Stewart was laid out in 1875, when the railroad was extended to that point. The community was named for D. B. Stewart, the original owner of the town site. A post office has been in operation at Stewart since 1874.
Stewart is on the Hocking River, just upstream from the confluence of Federal Creek with the river. It is located at the intersection of State Routes 144 and 329.
Coordinates: 39°18′29″N 81°53′40″W / 39.30806°N 81.89444°W / 39.30806; -81.89444