Home > PA > Westmoreland County > Irwin > Zip 15642

Zip Code 15642 — Irwin, PA

15642 is a ZIP Code associated with Irwin, PA, located within Westmoreland. The postal region supports an estimated population of 46,325 residents across Data Pending housing units, with a population density of 388.5 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (40.320450, -79.721190)

Data MetricLocal Statistic
Postal / Zip Code15642
Primary CityIrwin
State / ProvincePA
CountyWestmoreland
Total Population46,325
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density388.5 people/sq mi
TimezoneAmerica/New_York

How 15642 Compares

MetricZIP 15642Westmoreland CountyPA State Average
Population46,325362,42713,018,637
Median IncomeData PendingN/AN/A
Population Density388.5 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 15647Larimer1.5 mi49N/A
Zip 15692Westmoreland City2.4 mi992N/A
Zip 15678Rillton2.5 mi472N/A
Zip 15691Wendel2.6 mi302N/A
Zip 15615Ardara2.9 mi148N/A

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →