ZIP code · Mount Pleasant · Pennsylvania · United States
ZIP code 15666 — Mount Pleasant
ZIP code 15666 serves Mount Pleasant, Pennsylvania.
- Postal code
- 15666Single source Value from one source, not cross-checked.
- City
- Mount Pleasant
- County
- Westmoreland FIPS 42129
- State
- Pennsylvania
- Country
- United States
- Coordinates
- 40.1742, -79.5134 — precision precise (locality)
View on OpenStreetMap - Population
- 15,420 (ZCTA, ACS 5-year)
- Population density
- 289 / sq mi
- Land area
- 53.3 sq mi (138.1 km²) (ZCTA, ACS 5-year)
- Median household income
- $64,943
- Per-capita income
- $35,373
- Median age
- 49.3
- Households
- 7,140
- Housing units
- 7,730
- Median home value
- $154,700
- Median gross rent
- $802 / month
- Congressional district
- PA-14 (119th Congress)
- USDA hardiness zone
- 6b (-5 to 0 °F)Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
- Time zone
- America/New_York (UTC−5 / UTC−4 DST)
Tools: compare 15666 with another ZIP · ZIPs within 25 miles · distance from 15666
Map of ZIP code 15666
Climate — monthly normals
Warmest month Jul (avg high 82°F), coldest Jan (avg low 21°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 37 | 41 | 50 | 62 | 71 | 79 | 82 | 81 | 75 | 64 | 52 | 42 |
| Avg low °F | 21 | 21 | 28 | 36 | 47 | 56 | 60 | 59 | 51 | 40 | 31 | 25 |
| Precip in | 3.3 | 2.2 | 3.4 | 3.6 | 4.3 | 4.9 | 4.4 | 4.0 | 3.5 | 3.2 | 3.4 | 3.8 |
NOAA 1991–2020 climate normals from the nearest station: MT PLEASANT (3.0 mi) · NOAA NCEI
Places in ZIP 15666
- 9 schools
- 1 hospitals & clinics
- 1 pharmacies
- 2 supermarkets
- 11 restaurants & cafés
- 5 parks
- 8 playgrounds
- 1 libraries
- 2 post offices
- 11 places of worship
- 3 banks
- 1 gas stations
- 5 police & fire stations
Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology
About this page
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page