Home/PostalMag/Post Office Photos/Decatur, Ohio Post Office 45115 Post Office Photos Decatur, Ohio Post Office 45115 PostalMag · Sunday, August 15, 2021 The Decatur, Ohio Post Office serves ZIP Code 45115. Photo by Jimmy Emerson, some rights reserved. Photo shared under the Creative Commons License. Decatur Post Office 6471 Huff Hill Rd Decatur, OH 45115