Greentown is an unincorporated community in eastern Smithfield Township, Jefferson County, Ohio, United States. It lies approximately 2 miles (3.2 km) south of Smithfield, on a small road. Part of the Dry Fork of Short Creek, a stream that meets the Ohio River at Rayland, flows past the community. It is located 11 3⁄4 miles (18.9 km) southwest of Steubenville, the county seat of Jefferson County. The community is part of the Weirton–Steubenville, WV-OH Metropolitan Statistical Area.
Public education in the community of Greentown is provided by the Buckeye Local School District.
Coordinates: 40°15′05″N 80°46′06″W / 40.25139°N 80.76833°W