Fort Seneca, Ohio

Fort Seneca is a census-designated place in Pleasant Township, Seneca County, Ohio, United States. It is located on State Route 53, approximately North of Tiffin. Although unincorporated, Fort Seneca had a post office, with the ZIP code of 44829 until 1998. The post office was opened on December 15, 1821.The community of Fort Seneca was platted in 1836, and named after Old Fort Seneca, which was located 2 miles away from the present town site.