156421 Zip -

The 15642 ZIP Code serves Irwin, North Huntingdon, and portions of Penn Township in Pennsylvania. It is located approximately 20 miles southeast of Pittsburgh. Community & Infrastructure Irwin County: Westmoreland County

Most students in this ZIP Code attend the Norwin School District . Demographics & Economy 156421 zip

Approximately 33,000 residents as of recent census estimates. The 15642 ZIP Code serves Irwin, North Huntingdon,

💡 : U.S. ZIP Codes are always 5 digits in their basic form; the expanded ZIP+4 system uses 9 digits . The 15642 ZIP Code serves Irwin