Home/PostalMag/Post Office Photos/Unityville, Pennsylvania Post Office Post Office Photos Unityville, Pennsylvania Post Office PostalMag · Sunday, June 14, 2020 The Unityville Post Office serves ZIP Code 17774. Photo by Casey Monaghan, some rights reserved. Photo shared under the Creative Commons License. Unityville Post Office 215 Talmar Rd Unityville, PA 17774