Cincinnati, OH

ZIP code 45201 is a U.S. Postal Service PO Box ZIP code associated with Cincinnati, Ohio, rather than a conventional area used for street-address delivery. It therefore has no clearly defined neighborhood boundary, and landmarks cannot reliably be assigned as being “in” 45201. Well-known Cincinnati sites—including Fountain Square, the National Underground Railroad Freedom Center, and Great American Ball Park—are in the city, but are not specifically within this ZIP code.