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.