Home > PA > Westmoreland County > Mount Pleasant > Zip 15666

Zip Code 15666 — Mount Pleasant, PA

15666 is a ZIP Code associated with Mount Pleasant, PA, located within Westmoreland. The postal region supports an estimated population of 15,980 residents across Data Pending housing units, with a population density of 115.7 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (40.158580, -79.513980)

Data MetricLocal Statistic
Postal / Zip Code15666
Primary CityMount Pleasant
State / ProvincePA
CountyWestmoreland
Total Population15,980
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density115.7 people/sq mi
TimezoneAmerica/New_York

How 15666 Compares

MetricZIP 15666Westmoreland CountyPA State Average
Population15,980362,42713,018,637
Median IncomeData PendingN/AN/A
Population Density115.7 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 15674Norvelt3.5 mi158N/A
Zip 15688Tarrs3.9 mi612N/A
Zip 15612Alverton4.7 mi443N/A
Zip 15689United4.8 mi92N/A
Zip 15610Acme5.4 mi3,988N/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 →