77 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 15601 | Greensburg | 55,670 |
| 15642 | Irwin | 46,727 |
| 15068 | New Kensington | 36,068 |
| 15650 | Latrobe | 27,367 |
| 15644 | Jeannette | 18,675 |
| 15666 | Mount Pleasant | 15,420 |
| 15012 | Belle Vernon | 15,294 |
| 15668 | Murrysville | 14,477 |
| 15613 | Apollo | 12,732 |
| 15656 | Leechburg | 9,766 |
| 15632 | Export | 8,886 |
| 15085 | Trafford | 8,123 |
| 15658 | Ligonier | 8,114 |
| 15683 | Scottdale | 7,855 |
| 15062 | Monessen | 6,825 |
| 15089 | West Newton | 6,640 |
| 15627 | Derry | 5,956 |
| 15626 | Delmont | 5,168 |
| 15610 | Acme | 4,130 |
| 15636 | Harrison City | 3,839 |
| 15672 | New Stanton | 3,440 |
| 15944 | New Florence | 3,198 |
| 15670 | New Alexandria | 3,166 |
| 15697 | Youngwood | 2,906 |
| 15679 | Ruffs Dale | 2,438 |
| 15479 | Smithton | 2,275 |
| 15639 | Hunker | 2,028 |
| 15637 | Herminie | 1,889 |
| 15923 | Bolivar | 1,609 |
| 15675 | Penn | 1,259 |
| 15687 | Stahlstown | 1,186 |
| 15665 | Manor | 1,171 |
| 15083 | Sutersville | 1,061 |
| 15623 | Claridge | 1,026 |
| 15662 | Luxor | 928 |
| 15661 | Loyalhanna | 831 |
| 15698 | Yukon | 771 |
| 15692 | Westmoreland City | 769 |
| 15620 | Bradenville | 681 |
| 15688 | Tarrs | 666 |
| 15629 | East Vandergrift | 650 |
| 15671 | New Derry | 607 |
| 15633 | Forbes Road | 595 |
| 15779 | Torrance | 575 |
| 15612 | Alverton | 510 |
| 15624 | Crabtree | 489 |
| 15641 | Hyde Park | 484 |
| 15619 | Bovard | 472 |
| 15634 | Grapeville | 471 |
| 15676 | Pleasant Unity | 468 |
| 15655 | Laughlintown | 440 |
| 15616 | Armbrust | 433 |
| 15628 | Donegal | 423 |
| 15663 | Madison | 413 |
| 15677 | Rector | 387 |
| 15640 | Hutchinson | 360 |
| 15678 | Rillton | 332 |
| 15691 | Wendel | 329 |
| 15680 | Salina | 270 |
| 15684 | Slickville | 247 |
| 15617 | Arona | 246 |
| 15695 | Wyano | 243 |
| 15674 | Norvelt | 223 |
| 15696 | Youngstown | 219 |
| 15611 | Adamsburg | 214 |
| 15693 | Whitney | 176 |
| 15635 | Hannastown | 173 |
| 15646 | Jones Mills | 173 |
| 15615 | Ardara | 164 |
| 15448 | Jacobs Creek | 154 |
| 15660 | Lowber | 125 |
| 15625 | Darragh | 80 |
| 15087 | Webster | 68 |
| 15072 | Pricedale | 55 |
| 15689 | United | 51 |
| 15638 | Hostetter | 34 |
| 15647 | Larimer | 33 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 77 ZCTAs in Westmoreland County, Pennsylvania (US Census).