In which county is ZIP code 15666 located?

ZIP 15666 is listed under Westmoreland, PA.

When was this page updated?

This page was updated on 2026-01-08.

ZIP Code 15666: Mount Pleasant, PA

ZIP: 15666

County: Westmoreland

Coordinates: 40.17420, -79.51340

ZIP Type: Standard

Time Zone: Eastern Time (ET)

Explore detailed information for ZIP code 15666 in Mount Pleasant, PA. We include verified county details for Westmoreland plus key geographic references used for mapping and logistics.

Primary City	Mount Pleasant
ZIP Code	15666
County	Westmoreland
State	PA
Latitude / Longitude	40.17420, -79.51340
ZIP Type	Standard
Time Zone	Eastern Time (ET)
Data Updated	2026-01-08

Maps & Useful Links

Open in Maps: Google Maps · OpenStreetMap

These links show the approximate center point for ZIP 15666 (not an exact boundary).

Geographic & Administrative Context

Coordinates for 15666 are listed as 40.17420 / -79.51340, useful for GPS and service checks in and around Mount Pleasant, PA.

Local Coverage Notes

ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 15666 for mail delivery and general location reference in Westmoreland, PA.

Some addresses near Mount Pleasant may share this ZIP due to delivery routing and local service areas.

Related ZIP Codes (Nearby)

Explore other postal codes near Mount Pleasant within PA.

Frequently Asked Questions

What is the primary city for ZIP code 15666?

The primary city for this ZIP code is Mount Pleasant, located in PA.

In which county is 15666 located?

ZIP code 15666 is situated within Westmoreland, PA.

What are the coordinates for 15666?

The approximate center point is 40.17420 (Latitude) and -79.51340 (Longitude).

Is ZIP code 15666 active?

This page lists ZIP 15666 as Listed based on the latest refresh date shown above.

Does ZIP 15666 cover multiple areas?

Yes. Many ZIP codes cover multiple neighborhoods or nearby areas. For exact boundaries, use official mapping tools.

Methodology & Data Notes

How we build this page: We generate this page from a structured ZIP dataset and refresh key fields (city, county, and coordinates) during scheduled updates. Coordinates represent an approximate center point, not an official boundary map.
Sources: Public ZIP reference datasets and geographic coordinate references. If you use specific sources (e.g., USPS, Census), list them on your About/Methodology page.

Page updated: 2026-01-08