Founded in 1773, Westmoreland County is one of 67 counties in the state of Pennsylvania. Historically, Westmoreland County was formed from parts of Bedford County. The city of Greensburg is the county seat. With FIPS code of 129, Westmoreland County has a population of 353,057 and area of 1,036 square miles (2,683 km2).
List of all cities in Westmoreland County, PA alphabetically
| City/Town | Postal Code | Area Code |
| Acme, PA | 15610 | 724/878 |
| Adamsburg, PA | 15611 | 724/878 |
| Alcoa Center, PA | 15069 | 724/878 |
| Allegheny Power, PA | 15606 | 724/878 |
| Alverton, PA | 15612 | 724/878 |
| Apollo, PA | 15613 | 724/878 |
| Ardara, PA | 15615 | 724/878 |
| Armbrust, PA | 15616 | 724/878 |
| Arnold, PA | 15068 | 724/878 |
| Arona, PA | 15617 | 724/878 |
| Avonmore, PA | 15618 | 724/878 |
| Barking, PA | 15068 | 724/878 |
| Bolivar, PA | 15923 | 724/878 |
| Boltz, PA | 15954 | 814 |
| Bovard, PA | 15619 | 724/878 |
| Bradenville, PA | 15620 | 724/878 |
| Bureau of Voc Rehab, PA | 15605 | 724/878 |
| Calumet, PA | 15621 | 724/878 |
| Champion, PA | 15622 | 814 |
| Claridge, PA | 15623 | 724/878 |
| Crabtree, PA | 15624 | 724/878 |
| Cramer, PA | 15954 | 814 |
| Darragh, PA | 15625 | 724/878 |
| Delmont, PA | 15626 | 724/878 |
| Derry, PA | 15627 | 724/878 |
| Donegal, PA | 15628 | 724/878 |
| East Vandergrift, PA | 15629 | 724/878 |
| Edmon, PA | 15618 | 724/878 |
| Export, PA | 15632 | 724/878 |
| Forbes Rd, PA | 15633 | 724/878 |
| Forbes Road, PA | 15633 | 724/878 |
| GBG, PA | 15601 | 724/878 |
| Grapeville, PA | 15634 | 724/878 |
| Greensburg, PA | 15601 | 724/878 |
| 15605 | 724/878 | |
| 15606 | 724/878 | |
| Hannastown, PA | 15635 | 724/878 |
| Harrison City, PA | 15636 | 724/878 |
| Herminie, PA | 15637 | 724/878 |
| Hostetter, PA | 15638 | 724/878 |
| Hunker, PA | 15639 | 724/878 |
| Hutchinson, PA | 15640 | 724/878 |
| Hyde Park, PA | 15641 | 724/878 |
| Irwin, PA | 15642 | 724/878 |
| Jacobs Creek, PA | 15448 | 724/878 |
| Jeannette, PA | 15644 | 724/878 |
| Jones Mills, PA | 15646 | 724/878 |
| Larimer, PA | 15647 | 724/878 |
| Latrobe, PA | 15650 | 724/878 |
| Laughlintown, PA | 15655 | 724/878 |
| Ligonier, PA | 15658 | 724/878 |
| Lowber, PA | 15660 | 724/878 |
| Lower Burrell, PA | 15068 | 724/878 |
| Loyalhanna, PA | 15661 | 724/878 |
| Luxor, PA | 15662 | 724/878 |
| Madison, PA | 15663 | 724/878 |
| Mammoth, PA | 15664 | 724/878 |
| Manor, PA | 15665 | 724/878 |
| Monessen, PA | 15062 | 724/878 |
| Mount Pleasant, PA | 15666 | 724/878 |
| Murrysville, PA | 15668 | 724/878 |
| New Alexandria, PA | 15670 | 724/878 |
| New Derry, PA | 15671 | 724/878 |
| New Florence, PA | 15944 | 724/878 |
| New Kensington, PA | 15068 | 724/878 |
| 15069 | 724/878 | |
| New Stanton, PA | 15672 | 724/878 |
| North Huntingdon, PA | 15642 | 724/878 |
| North Irwin, PA | 15642 | 724/878 |
| Norvelt, PA | 15674 | 724/878 |
| Park, PA | 15690 | 724/878 |
| Parnassus, PA | 15068 | 724/878 |
| Penn, PA | 15675 | 724/878 |
| Pleasant Unity, PA | 15676 | 724/878 |
| Pricedale, PA | 15072 | 724/878 |
| Rector, PA | 15677 | 724/878 |
| Rillton, PA | 15678 | 724/878 |
| Ruffs Dale, PA | 15679 | 724/878 |
| Salina, PA | 15680 | 724/878 |
| Scottdale, PA | 15683 | 724/878 |
| Seward, PA | 15954 | 814 |
| Slickville, PA | 15684 | 724/878 |
| Smithton, PA | 15479 | 724/878 |
| Southwest, PA | 15685 | 724/878 |
| Stahlstown, PA | 15687 | 724/878 |
| Sutersville, PA | 15083 | 724/878 |
| Tarrs, PA | 15688 | 724/878 |
| Torrance, PA | 15779 | 724/878 |
| Trafford, PA | 15085 | 412/878 |
| United, PA | 15689 | 724/878 |
| Van Meter, PA | 15479 | 724/878 |
| Vandergrift, PA | 15690 | 724/878 |
| Webster, PA | 15087 | 724/878 |
| Wendel, PA | 15691 | 724/878 |
| West Newton, PA | 15089 | 724/878 |
| Westmoreland City, PA | 15692 | 724/878 |
| Westmrlnd City, PA | 15692 | 724/878 |
| Whitney, PA | 15693 | 724/878 |
| Wilpen, PA | 15658 | 724/878 |
| Wyano, PA | 15695 | 724/878 |
| Youngstown, PA | 15696 | 724/878 |
| Youngwood, PA | 15697 | 724/878 |
| Yukon, PA | 15698 | 724/878 |