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| City | Mammoth |
| State | Pennsylvania (PA) |
| County | Westmoreland |
| Country | United States of America |
| Timezone | Eastern Time (America/New_York) |
| Latitude | 40.200904 |
| Longitude | -79.463093 |
| Population | 373 |
| Density | 80.4 /km² |
| Incorporated | N/A |
| ZIP Code(s) | 15666, 15664 |
| Area Code | 215, 223, 267, 272, 412, 445, 484, 570, 582, 610, 717, 724, 814, 835, 878 |
| County Seat | Greensburg |
| School District | Mount Pleasant Area School District |
Mammoth is a locality in Westmoreland County, Pennsylvania, United States. It is a small community with a population of 373. The population density is 80.4 people per km². Mammoth is located at 40.2009°N, 79.4631°W. It observes the Eastern Time (America/New_York) timezone. ZIP code: 15666.
Mammoth sprawls across the rolling hills of Westmoreland County, a landscape etched by slow, patient erosion into a tapestry of green fields and shadowed ravines. It lies 16.7 miles east-south-east of North Huntingdon, PA (from North Huntingdon, PA: bearing 122°T), and is situated 8.0 miles south-south-east of Greensburg. The air here, especially in the late afternoon, carries a damp, earthy scent, a blend of tilled soil and the lingering breath of nearby woodlands that climb the gentle slopes. Houses, many with porches that seem to sag under the weight of years and memory, are scattered like seeds flung from a farmer's hand, their faded paint a muted testament to seasons past. The terrain itself is a study in subtle gradients, where drainage ditches carve their persistent lines and small creeks, often hidden from view, murmur their constant, liquid song. The history of Mammoth is inextricably linked to the coal seams that once pulsed beneath its surface, a legacy that shaped its very bones. For generations, the rhythmic clang of pickaxes and the rumble of trains hauling black diamonds were the soundtrack of life here, fueling industries far beyond these quiet valleys. While the deepest mines have long since fallen silent, the echoes of that era linger, a subtle undercurrent in the local character, a pragmatism born of hard labor and resilient spirit. Today, the economy, like the land, has shifted, finding its footing in smaller enterprises and the quiet hum of local commerce, a steady, unassuming rhythm that defines the everyday pulse of Mammoth.
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This page provides an embedded street and satellite map of Mammoth, Pennsylvania — switch between views using the small square in the bottom left-hand corner of the map. Coordinates: 40.200904, -79.463093. Live weather conditions are sourced directly from the National Weather Service, with current observations and a 7-day forecast also powered by Open-Meteo. Real-time local news and world news feeds keep the page current, while a Wikipedia summary or an editorially written description provides background on Mammoth and Westmoreland County.
Detailed location data for Mammoth includes the ZIP code (15666), telephone area code (215, 223, 267, 272, 412, 445, 484, 570, 582, 610, 717, 724, 814, 835, 878), county seat of Westmoreland County (Greensburg), and school district assignment (Mount Pleasant Area School District). These are among the most commonly searched location details for any US city or town.
Location data is drawn from the USGS Geographic Names Information System (GNIS) and cross-verified against 2020 US Census records by coordinate proximity — ensuring the correct Mammoth is identified even where the name is shared across multiple counties or states. Population figures are sourced from the 2020 US Census.
| Page generated | July 2026 |
| Location data | SimpleMaps US Cities Database; coordinates matched to USGS GNIS definitive data |
| Wikipedia validation | Article content matched to USGS GNIS coordinates via Wikipedia geosearch API. Location verified by proximity — not name matching alone. |