77 ZIP Codes
| Zip Code | City | Population ↓ |
|---|---|---|
| 15601 | Greensburg | 56,425 |
| 15642 | Irwin | 46,325 |
| 15068 | New Kensington | 36,203 |
| 15650 | Latrobe | 26,312 |
| 15644 | Jeannette | 18,512 |
| 15666 | Mount Pleasant | 15,980 |
| 15012 | Belle Vernon | 15,412 |
| 15668 | Murrysville | 14,584 |
| 15613 | Apollo | 12,854 |
| 15656 | Leechburg | 9,506 |
| 15632 | Export | 8,377 |
| 15658 | Ligonier | 8,115 |
| 15085 | Trafford | 8,062 |
| 15683 | Scottdale | 7,643 |
| 15089 | West Newton | 6,789 |
| 15062 | Monessen | 6,780 |
| 15627 | Derry | 6,167 |
| 15626 | Delmont | 5,129 |
| 15610 | Acme | 3,988 |
| 15670 | New Alexandria | 3,675 |
| 15636 | Harrison City | 3,560 |
| 15672 | New Stanton | 3,321 |
| 15944 | New Florence | 3,063 |
| 15697 | Youngwood | 2,877 |
| 15679 | Ruffs Dale | 2,781 |
| 15639 | Hunker | 2,160 |
| 15479 | Smithton | 2,010 |
| 15637 | Herminie | 1,821 |
| 15923 | Bolivar | 1,585 |
| 15665 | Manor | 1,339 |
| 15675 | Penn | 1,290 |
| 15687 | Stahlstown | 1,241 |
| 15623 | Claridge | 1,135 |
| 15692 | Westmoreland City | 992 |
| 15662 | Luxor | 969 |
| 15083 | Sutersville | 913 |
| 15661 | Loyalhanna | 858 |
| 15620 | Bradenville | 801 |
| 15698 | Yukon | 789 |
| 15633 | Forbes Road | 682 |
| 15671 | New Derry | 671 |
| 15629 | East Vandergrift | 631 |
| 15688 | Tarrs | 612 |
| 15676 | Pleasant Unity | 544 |
| 15779 | Torrance | 526 |
| 15677 | Rector | 516 |
| 15619 | Bovard | 488 |
| 15678 | Rillton | 472 |
| 15641 | Hyde Park | 464 |
| 15628 | Donegal | 458 |
| 15612 | Alverton | 443 |
| 15634 | Grapeville | 421 |
| 15663 | Madison | 377 |
| 15616 | Armbrust | 363 |
| 15655 | Laughlintown | 357 |
| 15640 | Hutchinson | 355 |
| 15691 | Wendel | 302 |
| 15660 | Lowber | 299 |
| 15693 | Whitney | 277 |
| 15617 | Arona | 262 |
| 15611 | Adamsburg | 241 |
| 15680 | Salina | 230 |
| 15635 | Hannastown | 228 |
| 15624 | Crabtree | 218 |
| 15696 | Youngstown | 218 |
| 15684 | Slickville | 201 |
| 15695 | Wyano | 181 |
| 15646 | Jones Mills | 161 |
| 15674 | Norvelt | 158 |
| 15448 | Jacobs Creek | 150 |
| 15615 | Ardara | 148 |
| 15638 | Hostetter | 104 |
| 15689 | United | 92 |
| 15087 | Webster | 85 |
| 15625 | Darragh | 58 |
| 15647 | Larimer | 49 |
| 15072 | Pricedale | 42 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 77 ZCTAs in Westmoreland County, Pennsylvania (US Census).