Kinsman is an unincorporated community and census-designated place in southern Kinsman Township, Trumbull County, Ohio, United States. Its population was 616 as of the 2010 census. Although it is unincorporated, it has a post office, with the ZIP code of 44428; as well as a library, the Kinsman Free Public Library. It lies along State Route 7 between Williamsfield and Burghill, at the intersection with State Route 5. Kinsman is named for John Kinsman,... Show more

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