Old Fort is a census-designated place located in northern Pleasant Township, Seneca County, Ohio, United States; located about a mile east of Ohio State Route 53 where N. Township Rd. 73 intersects with E. County Rd. 51. The ZIP code is 44861. The population was 143 at the 2020 census.

History

Old Fort was platted in 1882, and named after Fort Seneca, a fort built during the War of 1812. A post office has been in operation at Old Fort since 1882.

Geography

Old Fort sits adjacent to the Sandusky River, which is a tributary to Lake Erie.

Demographics

Historical population

Census	Pop.	Note	%±
2020	143		—
U.S. Decennial Census

Notable people

• Paul Gillmor, Republican U.S. representative representing the Ohio 5th District from 1988 to 2007.