Butler County Pennsylvania is covered by a total of 40 ZIP Codes. There are 13 ZIP Codes in Butler County that extend into adjacent counties (Allegheny County, Armstrong County, Beaver County, Clarion County, Lawrence County, Mercer County, Venango County, and Westmoreland County). Of the ZIP codes within or partially within Butler County there are 28 Standard ZIP Codes, 3 Unique ZIP Codes and 9 PO Box ZIP Codes.
Click on the ZIP Codes in the interactive map to view more information. The map control in the upper right corner can be used to toggle map layers on and off. The red outline is the border of Butler County and can be turned on and off. Each type of postal code can also be turned on and off.