156666 Zip -

Home to the Samuel Warden House and the Mount Pleasant Historic District, both on the National Register of Historic Places .

15621 (Donegal), 15683 (Scottdale), and 15697 (Youngwood). Local Highlights & History

The ZIP code (often mistakenly searched as 156666) belongs to Mount Pleasant, Pennsylvania . Located in Westmoreland County, this area is a historic hub famous for its 19th-century glass-making industry. 📍 Location & Demographics Primary City: Mount Pleasant, PA . County: Westmoreland County. Time Zone: Eastern Time (UTC-5). 156666 zip

Approximately 16,000 residents as of recent estimates.

As of April 2026, the real estate market in the 15666 ZIP code is considered "buyer-balanced": $192,500. Average Days on Market: 34 days. Home to the Samuel Warden House and the

Once a center for coke-making and glass production; the Mount Pleasant Glass Museum preserves this history.

Primarily two- and three-bedroom single-family detached homes. Located in Westmoreland County, this area is a

If you tell me you are interested in, I can find the exact postal code or property details for you. 15666, PA Zip Code Map - Pennsylvania - MapQuest