156421 Zip -

15642 is a valid ZIP Code for , and areas in Westmoreland County . However, 156421 is a 6-digit number and does not exist as a standard 5-digit United States ZIP Code.

A mix of historic borough residential areas and suburban developments. 156421 zip

Approximately 33,000 residents as of recent census estimates. 15642 is a valid ZIP Code for ,

💡 : U.S. ZIP Codes are always 5 digits in their basic form; the expanded ZIP+4 system uses 9 digits . 156421 zip