Westmoreland County, Pennsylvania Zip Codes
| Greensburg | 55,917 |
| Irwin | 46,855 |
| New Kensington | 36,199 |
| Latrobe | 27,106 |
| Jeannette | 18,665 |
| Mount Pleasant | 15,592 |
| Belle Vernon | 15,301 |
| Murrysville | 14,179 |
| Apollo | 12,541 |
| Leechburg | 9,908 |
| Export | 9,322 |
| Ligonier | 8,364 |
| Scottdale | 8,074 |
| Trafford | 7,966 |
| Monessen | 6,876 |
| West Newton | 6,294 |
| Derry | 6,032 |
| Delmont | 4,967 |
| Harrison City | 3,904 |
| Acme | 3,827 |
| New Stanton | 3,410 |
| New Florence | 3,149 |
| New Alexandria | 3,028 |
| Youngwood | 2,933 |
| Ruffs Dale | 2,501 |
| Smithton | 2,071 |
| Hunker | 1,924 |
| Herminie | 1,678 |
| Bolivar | 1,554 |
| Penn | 1,472 |
| Manor | 1,342 |
| Stahlstown | 1,181 |
| Loyalhanna | 1,006 |
| Sutersville | 987 |
| Luxor | 951 |
| Tarrs | 814 |
| Claridge | 737 |
| Pleasant Unity | 717 |
| East Vandergrift | 701 |
| New Derry | 674 |
| Yukon | 672 |
| Westmoreland City | 671 |
| Bradenville | 632 |
| Forbes Road | 613 |
| Rillton | 528 |
| Torrance | 527 |
| Hutchinson | 505 |
| Hyde Park | 501 |
| Slickville | 460 |
| Madison | 451 |
| Wendel | 427 |
| Armbrust | 427 |
| Crabtree | 402 |
| Donegal | 389 |
| Rector | 376 |
| Alverton | 375 |
| Grapeville | 343 |
| Wyano | 313 |
| Whitney | 292 |
| Bovard | 291 |
| Norvelt | 271 |
| Laughlintown | 269 |
| Arona | 255 |
| Youngstown | 251 |
| Ardara | 223 |
| Salina | 222 |
| Jacobs Creek | 204 |
| Lowber | 196 |
| Adamsburg | 161 |
| Jones Mills | 160 |
| Darragh | 97 |
| Webster | 82 |
| Hannastown | 79 |
| United | 74 |
| Hostetter | 62 |
| Pricedale | 44 |
| Larimer | 37 |
- Population is the most recent figure from the U.S. Census Bureau's 2022 American Community Survey (ACS) 5-Year Estimates.