| Name | Status | Population census 1990-04-01 | Population census 2000-04-01 | Population census 2010-04-01 | |
|---|---|---|---|---|---|
| Westmoreland | County | 370,321 | 369,990 | 365,169 | o |
| Pennsylvania | Federal State | 11,882,842 | 12,280,548 | 12,702,379 |
| Name | Status | Population census 1990-04-01 | Population census 2000-04-01 | Population census 2010-04-01 | |
|---|---|---|---|---|---|
| Adamsburg | Borough | 257 | 221 | 172 | o |
| Arnold | City | 6,014 | 5,667 | 5,157 | o |
| Arona | Borough | 397 | 403 | 370 | o |
| Avonmore | Borough | 1,089 | 820 | 1,011 | o |
| Bolivar | Borough | 544 | 501 | 465 | o |
| Bradenville | Census-Designated Place | ... | ... | 545 | o |
| Calumet | Census-Designated Place | ... | ... | 1,241 | o |
| Collinsburg | Census-Designated Place | ... | ... | 1,125 | o |
| Crabtree | Census-Designated Place | ... | ... | 277 | o |
| Delmont | Borough | 2,039 | 2,497 | 2,686 | o |
| Derry | Borough | 2,959 | 2,991 | 2,688 | o |
| Donegal | Borough | 212 | 165 | 120 | o |
| East Vandergrift | Borough | 787 | 742 | 674 | o |
| Export | Borough | 963 | 895 | 917 | o |
| Fellsburg | Census-Designated Place | ... | ... | 1,180 | o |
| Grapeville | Census-Designated Place | ... | 676 | 538 | o |
| Greensburg | City | 16,305 | 15,892 | 14,892 | o |
| Harrison City | Census-Designated Place | ... | 155 | 134 | o |
| Herminie | Census-Designated Place | ... | 856 | 789 | o |
| Hostetter | Census-Designated Place | ... | ... | 740 | o |
| Hunker | Borough | 328 | 329 | 291 | o |
| Hyde Park | Borough | 542 | 513 | 500 | o |
| Irwin | Borough | 4,618 | 4,366 | 3,973 | o |
| Jeannette | City | 11,161 | 10,654 | 9,654 | o |
| Latrobe | City | 9,485 | 8,994 | 8,338 | o |
| Laurel Mountain | Borough | 195 | 185 | 167 | o |
| Lawson Heights | Census-Designated Place | 2,464 | 2,339 | 2,194 | o |
| Level Green | Census-Designated Place | ... | ... | 4,020 | o |
| Ligonier | Borough | 1,694 | 1,695 | 1,573 | o |
| Lower Burrell | City | 12,245 | 12,609 | 11,761 | o |
| Loyalhanna | Census-Designated Place | 3,708 | 3,415 | 3,428 | o |
| Madison | Borough | 550 | 510 | 397 | o |
| Mammoth | Census-Designated Place | ... | ... | 525 | o |
| Manor | Borough | 2,639 | 2,717 | 3,239 | o |
| Millwood | Census-Designated Place | ... | ... | 566 | o |
| Monessen | City | 9,811 | 8,669 | 7,720 | o |
| Mount Pleasant | Borough | 4,720 | 4,728 | 4,454 | o |
| Murrysville | Municipality | 17,287 | 18,809 | 20,079 | o |
| New Alexandria | Borough | 571 | 595 | 560 | o |
| New Florence | Borough | 909 | 784 | 689 | o |
| New Kensington | City | 15,967 | 14,700 | 13,116 | o |
| New Stanton | Borough | 2,077 | 1,906 | 2,173 | o |
| North Belle Vernon | Borough | 2,121 | 2,107 | 1,971 | o |
| North Irwin | Borough | 1,021 | 879 | 846 | o |
| Norvelt | Census-Designated Place | ... | ... | 948 | o |
| Oklahoma | Borough | 959 | 915 | 809 | o |
| Penn | Borough | 503 | 460 | 475 | o |
| Scottdale | Borough | 5,212 | 4,772 | 4,384 | o |
| Seward | Borough | 517 | 484 | 495 | o |
| Slickville | Census-Designated Place | ... | ... | 388 | o |
| Smithton | Borough | 399 | 444 | 399 | o |
| South Greensburg | Borough | 2,343 | 2,280 | 2,117 | o |
| Southwest Greensburg | Borough | 2,455 | 2,398 | 2,155 | o |
| St. Vincent College | Census-Designated Place | ... | ... | 1,357 | o |
| Sutersville | Borough | 755 | 636 | 605 | o |
| Vandergrift | Borough | 5,877 | 5,455 | 5,205 | o |
| Webster | Census-Designated Place | ... | ... | 255 | o |
| West Leechburg | Borough | 1,359 | 1,290 | 1,294 | o |
| West Newton | Borough | 3,246 | 3,083 | 2,633 | o |
| Wyano | Census-Designated Place | ... | ... | 484 | o |
| Youngstown | Borough | 370 | 400 | 326 | o |
| Youngwood | Borough | ... | 3,304 | 3,050 | o |
| Yukon | Census-Designated Place | ... | ... | 677 | o |
Source: US Census Bureau (web).
2011-04-03WWW.CITYPOPULATION.DE