131 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Pittsburgh | 1 | 310,103 | 302,798 | 0.39% | 5,600 | 55 | City |
| Penn Hills | 2 | 39,294 | 40,998 | -0.44% | 2,053 | 19 | Township |
| Mount Lebanon | 3 | 32,605 | 34,022 | -0.48% | 5,364 | 6 | Township |
| Ross | 4 | 32,239 | 33,531 | -0.34% | 2,228 | 14 | Township |
| Bethel Park | 5 | 31,806 | 33,515 | -0.89% | 2,718 | 12 | Township |
| McCandless | 6 | 28,468 | 29,665 | -0.38% | 1,726 | 16 | Township |
| Monroeville | 7 | 27,622 | 28,653 | -0.62% | 1,401 | 20 | Township |
| Moon | 8 | 26,875 | 27,214 | 0.23% | 1,125 | 24 | Township |
| Shaler | 9 | 26,865 | 28,083 | -0.45% | 2,427 | 11 | Township |
| Plum | 10 | 26,060 | 27,140 | -0.69% | 912 | 29 | Borough |
| Upper St. Clair | 11 | 20,525 | 21,143 | -0.23% | 2,091 | 10 | Township |
| Baldwin | 12 | 20,324 | 21,487 | -0.95% | 3,522 | 6 | Borough |
| South Fayette | 13 | 18,744 | 18,351 | 0.42% | 923 | 20 | Township |
| West Mifflin | 14 | 18,567 | 19,571 | -0.89% | 1,306 | 14 | Borough |
| Hampton | 15 | 17,848 | 18,467 | -0.31% | 1,101 | 16 | Township |
| Scott | 16 | 16,867 | 17,619 | -0.43% | 4,332 | 4 | Township |
| McKeesport | 17 | 16,825 | 17,707 | -0.87% | 3,332 | 5 | City |
| North Fayette | 18 | 15,928 | 16,195 | -0.3% | 632 | 25 | Township |
| Pine | 19 | 15,721 | 14,743 | 0.59% | 927 | 17 | Township |
| Franklin Park | 20 | 14,872 | 15,493 | -0.69% | 1,098 | 14 | Borough |
| South Park | 21 | 13,708 | 13,718 | 0.01% | 1,468 | 9 | Township |
| Wilkinsburg | 22 | 13,536 | 14,327 | -0.97% | 6,008 | 2 | Borough |
| Elizabeth | 23 | 12,409 | 12,956 | -0.43% | 545 | 23 | Township |
| West Deer | 24 | 12,394 | 12,270 | 0.62% | 428 | 29 | Township |
| Jefferson Hills | 25 | 12,223 | 12,426 | -0.28% | 737 | 17 | Borough |
| Lower Burrell | 26 | 11,440 | 11,745 | -0.44% | 1,015 | 11 | City |
| Marshall | 27 | 10,802 | 10,153 | 1.95% | 700 | 15 | Township |
| Munhall | 28 | 10,174 | 10,764 | -0.95% | 4,437 | 2 | Borough |
| Harrison | 29 | 9,696 | 10,158 | -0.46% | 1,313 | 7 | Township |
| North Versailles | 30 | 9,596 | 10,061 | -0.51% | 1,199 | 8 | Township |
| Brentwood | 31 | 9,518 | 10,075 | -0.97% | 6,569 | 1 | Borough |
| Findlay | 32 | 9,290 | 6,411 | 10.81% | 288 | 32 | Township |
| Collier | 33 | 9,120 | 8,944 | 0.58% | 670 | 14 | Township |
| Economy | 34 | 8,945 | 9,079 | -0.25% | 501 | 18 | Borough |
| O'Hara | 35 | 8,939 | 9,274 | -0.27% | 1,274 | 7 | Township |
| Kennedy | 36 | 8,373 | 8,697 | -0.39% | 1,527 | 5 | Township |
| Pleasant Hills | 37 | 8,232 | 8,490 | -0.52% | 2,965 | 3 | Borough |
| Swissvale | 38 | 8,118 | 8,603 | -0.99% | 6,731 | 1 | Borough |
| Castle Shannon | 39 | 7,998 | 8,286 | -0.6% | 5,005 | 2 | Borough |
| Bellevue | 40 | 7,844 | 8,300 | -0.96% | 7,766 | 1 | Borough |
| Dormont | 41 | 7,769 | 8,227 | -0.97% | 10,222 | 1 | Borough |
| Carnegie | 42 | 7,723 | 8,118 | -0.85% | 4,764 | 2 | Borough |
| Ohio | 43 | 7,418 | 7,172 | 0.6% | 1,083 | 7 | Township |
| White Oak | 44 | 7,215 | 7,625 | -0.93% | 1,090 | 7 | Borough |
| Oakmont | 45 | 6,559 | 6,765 | -0.52% | 4,141 | 2 | Borough |
| West View | 46 | 6,302 | 6,673 | -0.97% | 6,240 | 1 | Borough |
| Stowe | 47 | 6,125 | 6,423 | -0.5% | 3,090 | 2 | Township |
| Forest Hills | 48 | 6,069 | 6,419 | -0.95% | 3,878 | 2 | Borough |
| Wilkins | 49 | 6,059 | 6,344 | -0.48% | 2,211 | 3 | Township |
| Clairton | 50 | 5,831 | 6,172 | -0.97% | 2,106 | 3 | City |
| Crafton | 51 | 5,750 | 6,088 | -0.96% | 5,035 | 1 | Borough |
| McKees Rocks | 52 | 5,586 | 5,909 | -0.96% | 5,290 | 1 | Borough |
| Sewickley | 53 | 5,515 | 5,644 | -0.34% | 206 | 27 | Township |
| Coraopolis | 54 | 5,238 | 5,544 | -0.96% | 3,938 | 1 | Borough |
| Fox Chapel | 55 | 5,108 | 5,338 | -0.74% | 649 | 8 | Borough |
| Duquesne | 56 | 4,988 | 5,246 | -0.85% | 2,747 | 2 | City |
| Turtle Creek | 57 | 4,831 | 5,112 | -0.96% | 4,965 | 1 | Borough |
| Green Tree | 58 | 4,661 | 4,930 | -0.96% | 2,246 | 2 | Borough |
| Arnold | 59 | 4,603 | 4,764 | -0.58% | 6,288 | 1 | City |
| Bridgeville | 60 | 4,533 | 4,794 | -0.94% | 4,140 | 1 | Borough |
| Avalon | 61 | 4,507 | 4,768 | -0.95% | 7,305 | 1 | Borough |
| Glassport | 62 | 4,215 | 4,464 | -0.96% | 2,664 | 2 | Borough |
| Tarentum | 63 | 4,103 | 4,343 | -0.97% | 3,336 | 1 | Borough |
| North Braddock | 64 | 4,068 | 4,311 | -0.97% | 2,727 | 1 | Borough |
| Elizabeth | 65 | 3,952 | 3,980 | -0.2% | 227 | 17 | Township |
| Sewickley | 66 | 3,704 | 3,901 | -0.88% | 3,708 | 1 | Borough |
| Port Vue | 67 | 3,508 | 3,670 | -0.76% | 3,093 | 1 | Borough |
| Etna | 68 | 3,241 | 3,430 | -0.95% | 4,404 | 1 | Borough |
| Springdale | 69 | 3,210 | 3,395 | -0.96% | 3,437 | 1 | Borough |
| Millvale | 70 | 3,197 | 3,370 | -0.9% | 5,165 | 1 | Borough |
| Mount Oliver | 71 | 3,196 | 3,385 | -0.96% | 9,428 | 0 | Borough |
| Ingram | 72 | 3,192 | 3,383 | -0.99% | 7,355 | 0 | Borough |
| Reserve | 73 | 3,119 | 3,247 | -0.45% | 1,511 | 2 | Township |
| Brackenridge | 74 | 3,067 | 3,240 | -0.94% | 5,979 | 1 | Borough |
| Sharpsburg | 75 | 3,004 | 3,181 | -0.96% | 6,219 | 0 | Borough |
| Harmar | 76 | 2,993 | 3,129 | -0.47% | 510 | 6 | Township |
| Edgewood | 77 | 2,980 | 3,136 | -0.86% | 5,068 | 1 | Borough |
| Churchill | 78 | 2,977 | 3,151 | -0.96% | 1,361 | 2 | Borough |
| Pitcairn | 79 | 2,925 | 3,101 | -0.98% | 5,781 | 1 | Borough |
| Forward | 80 | 2,912 | 3,061 | -0.58% | 154 | 19 | Township |
| Homestead | 81 | 2,837 | 2,881 | -0.25% | 4,925 | 1 | Borough |
| Seven Fields | 82 | 2,832 | 2,919 | -0.49% | 3,518 | 1 | Borough |
| Aspinwall | 83 | 2,749 | 2,911 | -0.97% | 7,832 | 0 | Borough |
| Emsworth | 84 | 2,379 | 2,520 | -0.96% | 4,181 | 1 | Borough |
| Crescent | 85 | 2,370 | 2,479 | -0.5% | 1,133 | 2 | Township |
| Verona | 86 | 2,357 | 2,494 | -0.97% | 4,649 | 1 | Borough |
| Morgan | 87 | 2,121 | 2,327 | -1.71% | 86 | 25 | Township |
| Fawn | 88 | 2,110 | 2,191 | -0.33% | 164 | 13 | Township |
| McDonald | 89 | 1,992 | 2,055 | -0.5% | 3,846 | 1 | Borough |
| East McKeesport | 90 | 1,952 | 2,069 | -0.96% | 4,726 | 0 | Borough |
| Rankin | 91 | 1,921 | 1,888 | 0.31% | 4,436 | 0 | Borough |
| Baldwin | 92 | 1,904 | 1,983 | -0.42% | 3,770 | 1 | Township |
| East Pittsburgh | 93 | 1,819 | 1,926 | -0.98% | 4,688 | 0 | Borough |
| Ben Avon | 94 | 1,805 | 1,912 | -0.99% | 4,763 | 0 | Borough |
| West Homestead | 95 | 1,772 | 1,868 | -0.89% | 1,922 | 1 | Borough |
| Wilmerding | 96 | 1,687 | 1,782 | -0.94% | 3,932 | 0 | Borough |
| Braddock | 97 | 1,643 | 1,721 | -0.79% | 2,918 | 1 | Borough |
| Braddock Hills | 98 | 1,634 | 1,732 | -0.97% | 1,724 | 1 | Borough |
| Edgeworth | 99 | 1,608 | 1,677 | -0.68% | 1,075 | 1 | Borough |
| Cheswick | 100 | 1,581 | 1,670 | -0.94% | 3,415 | 0 | Borough |
| Leet | 101 | 1,549 | 1,618 | -0.45% | 1,031 | 2 | Township |
| Dravosburg | 102 | 1,523 | 1,609 | -0.91% | 1,577 | 1 | Borough |
| Springdale | 103 | 1,458 | 1,534 | -0.61% | 647 | 2 | Township |
| Bell Acres | 104 | 1,449 | 1,506 | -0.62% | 271 | 5 | Borough |
| East Deer | 105 | 1,417 | 1,488 | -0.56% | 623 | 2 | Township |
| Oakdale | 106 | 1,402 | 1,477 | -0.85% | 2,989 | 0 | Borough |
| Versailles | 107 | 1,396 | 1,479 | -0.99% | 2,884 | 0 | Borough |
| Blawnox | 108 | 1,373 | 1,454 | -0.94% | 4,639 | 0 | Borough |
| Elizabeth | 109 | 1,338 | 1,395 | -0.67% | 3,901 | 0 | Borough |
| Heidelberg | 110 | 1,216 | 1,287 | -0.98% | 4,237 | 0 | Borough |
| Frazer | 111 | 1,214 | 1,162 | -0.49% | 130 | 9 | Township |
| Bradford Woods | 112 | 1,119 | 1,185 | -0.97% | 1,256 | 1 | Borough |
| Whitaker | 113 | 1,113 | 1,178 | -0.98% | 3,760 | 0 | Borough |
| Leetsdale | 114 | 1,099 | 1,158 | -0.9% | 1,100 | 1 | Borough |
| Neville | 115 | 1,055 | 1,105 | -0.47% | 689 | 2 | Township |
| Lincoln | 116 | 877 | 930 | -1.02% | 183 | 5 | Borough |
| Sewickley Heights | 117 | 811 | 849 | -0.73% | 111 | 7 | Borough |
| North Irwin | 118 | 808 | 822 | -0.25% | 4,000 | 0 | Borough |
| Kilbuck | 119 | 738 | 776 | -0.54% | 291 | 3 | Township |
| Chalfant | 120 | 704 | 746 | -0.98% | 4,456 | 0 | Borough |
| Sewickley Hills | 121 | 684 | 692 | -0.15% | 277 | 2 | Borough |
| Pennsbury Village | 122 | 637 | 675 | -0.93% | 8,493 | 0 | Borough |
| Glen Osborne | 123 | 558 | 588 | -0.89% | 1,298 | 0 | Borough |
| Wall | 124 | 485 | 515 | -1.02% | 1,110 | 0 | Borough |
| Thornburg | 125 | 441 | 465 | -0.9% | 1,007 | 0 | Borough |
| Rosslyn Farms | 126 | 417 | 440 | -0.95% | 751 | 1 | Borough |
| West Elizabeth | 127 | 379 | 403 | -1.04% | 2,117 | 0 | Borough |
| Ben Avon Heights | 128 | 377 | 398 | -0.79% | 2,167 | 0 | Borough |
| South Versailles | 129 | 297 | 316 | -1% | 343 | 1 | Township |
| Glenfield | 130 | 196 | 208 | -1.01% | 239 | 1 | Borough |
| Haysville | 131 | 77 | 82 | -1.28% | 445 | 0 | Borough |
Pittsburgh is the largest city in Allegheny County, with a population of 310,103.
Haysville is the smallest city in Allegheny County, with a population of 77.
There are 131 cities in Allegheny County, Pennsylvania.