Maynard is an unincorporated community in western Colerain Township, Belmont County, Ohio, United States, along Wheeling Creek. Although it is unincorporated, it has a post office, with the ZIP code of 43937. Maynard is part of the Wheeling, WV-OH Metropolitan Statistical Area. The community is near the border with Wheeling Township and its sister community of Blainesville. Maynard is a part of the St.