ZIP Code 15123

ZIP code 15123 is a five-digit postal code used by the United States Postal Service for addresses in West Mifflin, Pennsylvania. The ZIP lies within Allegheny County. Clocks here follow the America/New_York time zone (UTC-4).

What you can do with ZIP code 15123

• Write a mailing address: West Mifflin, PA 15123. The ZIP goes last, after the state abbreviation.
• Check whether a shipping or delivery quote applies to this area — most US carriers price by ZIP code rather than by city.
• Look up the local time zone before scheduling a call — the ZIP tells you which zone applies to that address.
• Compare the ZIP with neighbouring codes to see how population and income shift block by block.