129 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Pittsburgh | 1 | 303,572 | 302,779 | 0.05% | 5,482 | 55.38 | City |
| Penn Hills township | 2 | 38,721 | 40,992 | -1.18% | 2,023 | 19.14 | Township |
| Mount Lebanon township | 3 | 32,404 | 34,020 | -0.82% | 5,331 | 6.08 | Township |
| Ross township | 4 | 31,691 | 33,528 | -1.16% | 2,190 | 14.47 | Township |
| Bethel Park | 5 | 31,653 | 33,515 | -1.16% | 2,705 | 11.70 | Township |
| McCandless township | 6 | 28,109 | 29,664 | -0.99% | 1,704 | 16.49 | Township |
| Monroeville | 7 | 27,524 | 28,649 | -0.81% | 1,396 | 19.72 | Township |
| Shaler township | 8 | 26,498 | 28,083 | -1.15% | 2,394 | 11.07 | Township |
| Moon township | 9 | 26,359 | 27,216 | -0.44% | 1,104 | 23.88 | Township |
| Plum | 10 | 25,890 | 27,142 | -0.96% | 906 | 28.57 | Borough |
| Baldwin | 11 | 20,197 | 21,474 | -1.25% | 3,500 | 5.77 | Borough |
| Upper St. Clair township | 12 | 20,165 | 21,137 | -1.02% | 2,054 | 9.82 | Township |
| West Mifflin | 13 | 18,483 | 19,565 | -1.16% | 1,300 | 14.22 | Borough |
| South Fayette township | 14 | 18,446 | 18,352 | 0.01% | 909 | 20.30 | Township |
| Hampton township | 15 | 17,592 | 18,464 | -0.98% | 1,085 | 16.21 | Township |
| McKeesport | 16 | 16,747 | 17,709 | -1.13% | 3,317 | 5.05 | City |
| Scott township | 17 | 16,636 | 17,619 | -1.12% | 4,272 | 3.89 | Township |
| North Fayette township | 18 | 15,824 | 16,190 | -0.6% | 628 | 25.19 | Township |
| Pine township | 19 | 15,602 | 14,744 | 0.69% | 919 | 16.97 | Township |
| Franklin Park | 20 | 14,712 | 15,492 | -1.05% | 1,087 | 13.54 | Borough |
| South Park township | 21 | 13,710 | 13,718 | 0.21% | 1,468 | 9.34 | Township |
| Wilkinsburg | 22 | 13,470 | 14,327 | -1.25% | 5,979 | 2.25 | Borough |
| Elizabeth township | 23 | 12,238 | 12,957 | -1.11% | 537 | 22.78 | Township |
| Jefferson Hills | 24 | 12,012 | 12,427 | -0.69% | 724 | 16.59 | Borough |
| West Deer township | 25 | 11,887 | 12,267 | -0.94% | 411 | 28.93 | Township |
| Lower Burrell | 26 | 11,442 | 11,739 | -0.51% | 1,015 | 11.27 | City |
| Munhall | 27 | 10,124 | 10,764 | -1.25% | 4,415 | 2.29 | Borough |
| Marshall township | 28 | 10,083 | 10,147 | -0.28% | 653 | 15.44 | Township |
| Harrison township | 29 | 9,562 | 10,157 | -1.18% | 1,294 | 7.39 | Township |
| North Versailles township | 30 | 9,477 | 10,061 | -1.18% | 1,184 | 8 | Township |
| Brentwood | 31 | 9,464 | 10,069 | -1.26% | 6,531 | 1.45 | Borough |
| Collier township | 32 | 8,923 | 8,945 | -0.03% | 655 | 13.61 | Township |
| Economy | 33 | 8,880 | 9,084 | -0.46% | 497 | 17.87 | Borough |
| O'Hara township | 34 | 8,781 | 9,272 | -1.08% | 1,252 | 7.01 | Township |
| Kennedy township | 35 | 8,248 | 8,697 | -1.13% | 1,504 | 5.48 | Township |
| Pleasant Hills | 36 | 8,212 | 8,487 | -0.66% | 2,958 | 2.78 | Borough |
| Swissvale | 37 | 8,080 | 8,604 | -1.28% | 6,700 | 1.21 | Borough |
| Castle Shannon | 38 | 7,975 | 8,290 | -0.78% | 4,991 | 1.60 | Borough |
| Bellevue | 39 | 7,800 | 8,300 | -1.27% | 7,723 | 1.01 | Borough |
| Dormont | 40 | 7,732 | 8,227 | -1.26% | 10,174 | 0.76 | Borough |
| Carnegie | 41 | 7,663 | 8,122 | -1.19% | 4,727 | 1.62 | Borough |
| Ohio township | 42 | 7,407 | 7,168 | 1.04% | 1,081 | 6.85 | Township |
| White Oak | 43 | 7,165 | 7,617 | -1.24% | 1,082 | 6.62 | Borough |
| Findlay township | 44 | 6,568 | 6,409 | 0.17% | 204 | 32.26 | Township |
| Oakmont | 45 | 6,532 | 6,767 | -0.71% | 4,124 | 1.58 | Borough |
| West View | 46 | 6,277 | 6,676 | -1.26% | 6,215 | 1.01 | Borough |
| Stowe township | 47 | 6,047 | 6,421 | -1.18% | 3,051 | 1.98 | Township |
| Forest Hills | 48 | 6,036 | 6,418 | -1.24% | 3,857 | 1.56 | Borough |
| Wilkins township | 49 | 5,982 | 6,344 | -1.16% | 2,182 | 2.74 | Township |
| Clairton | 50 | 5,801 | 6,171 | -1.26% | 2,095 | 2.77 | City |
| Crafton | 51 | 5,720 | 6,085 | -1.26% | 5,009 | 1.14 | Borough |
| McKees Rocks | 52 | 5,553 | 5,908 | -1.26% | 5,259 | 1.06 | Borough |
| Sewickley township | 53 | 5,545 | 5,648 | -0.22% | 207 | 26.76 | Township |
| Coraopolis | 54 | 5,210 | 5,544 | -1.27% | 3,917 | 1.33 | Borough |
| Fox Chapel | 55 | 5,075 | 5,337 | -1.01% | 645 | 7.87 | Borough |
| Duquesne | 56 | 4,958 | 5,243 | -1.14% | 2,730 | 1.82 | City |
| Turtle Creek | 57 | 4,807 | 5,111 | -1.25% | 4,940 | 0.97 | Borough |
| Green Tree | 58 | 4,639 | 4,929 | -1.23% | 2,236 | 2.08 | Borough |
| Arnold | 59 | 4,610 | 4,774 | -0.71% | 6,298 | 0.73 | City |
| Bridgeville | 60 | 4,508 | 4,793 | -1.25% | 4,117 | 1.09 | Borough |
| Avalon | 61 | 4,473 | 4,760 | -1.26% | 7,250 | 0.62 | Borough |
| Glassport | 62 | 4,193 | 4,463 | -1.27% | 2,650 | 1.58 | Borough |
| Tarentum | 63 | 4,083 | 4,343 | -1.26% | 3,320 | 1.23 | Borough |
| North Braddock | 64 | 4,048 | 4,310 | -1.27% | 2,713 | 1.49 | Borough |
| Elizabeth township | 65 | 3,959 | 3,980 | -0.1% | 228 | 17.39 | Township |
| Sewickley | 66 | 3,685 | 3,902 | -1.15% | 3,689 | 1 | Borough |
| Port Vue | 67 | 3,498 | 3,672 | -0.99% | 3,085 | 1.13 | Borough |
| Etna | 68 | 3,227 | 3,432 | -1.26% | 4,385 | 0.74 | Borough |
| Springdale | 69 | 3,191 | 3,395 | -1.27% | 3,416 | 0.93 | Borough |
| Mount Oliver | 70 | 3,178 | 3,385 | -1.27% | 9,375 | 0.34 | Borough |
| Ingram | 71 | 3,176 | 3,383 | -1.27% | 7,318 | 0.43 | Borough |
| Millvale | 72 | 3,171 | 3,368 | -1.21% | 5,123 | 0.62 | Borough |
| Reserve township | 73 | 3,091 | 3,244 | -0.87% | 1,498 | 2.06 | Township |
| Brackenridge | 74 | 3,052 | 3,239 | -1.2% | 5,949 | 0.51 | Borough |
| Sharpsburg | 75 | 2,985 | 3,177 | -1.26% | 6,180 | 0.48 | Borough |
| Churchill | 76 | 2,959 | 3,148 | -1.27% | 1,352 | 2.19 | Borough |
| Harmar township | 77 | 2,955 | 3,131 | -1.17% | 504 | 5.87 | Township |
| Edgewood | 78 | 2,953 | 3,135 | -1.2% | 5,022 | 0.59 | Borough |
| Pitcairn | 79 | 2,911 | 3,100 | -1.29% | 5,753 | 0.51 | Borough |
| Forward township | 80 | 2,881 | 3,063 | -1.2% | 152 | 18.93 | Township |
| Homestead | 81 | 2,834 | 2,881 | -0.32% | 4,920 | 0.58 | Borough |
| Seven Fields | 82 | 2,822 | 2,921 | -0.7% | 3,506 | 0.81 | Borough |
| Aspinwall | 83 | 2,735 | 2,912 | -1.26% | 7,792 | 0.35 | Borough |
| Emsworth | 84 | 2,365 | 2,517 | -1.25% | 4,156 | 0.57 | Borough |
| Crescent township | 85 | 2,337 | 2,477 | -1.23% | 1,117 | 2.09 | Township |
| Verona | 86 | 2,335 | 2,485 | -1.27% | 4,606 | 0.51 | Borough |
| Morgan township | 87 | 2,172 | 2,331 | -1.18% | 88 | 24.70 | Township |
| Fawn township | 88 | 2,081 | 2,191 | -1% | 162 | 12.86 | Township |
| McDonald | 89 | 1,993 | 2,053 | -0.6% | 3,847 | 0.52 | Borough |
| East McKeesport | 90 | 1,941 | 2,068 | -1.27% | 4,700 | 0.41 | Borough |
| Baldwin township | 91 | 1,881 | 1,980 | -0.95% | 3,725 | 0.51 | Township |
| East Pittsburgh | 92 | 1,808 | 1,925 | -1.26% | 4,660 | 0.39 | Borough |
| Ben Avon | 93 | 1,804 | 1,919 | -1.26% | 4,760 | 0.38 | Borough |
| Rankin | 94 | 1,774 | 1,889 | -1.28% | 4,097 | 0.43 | Borough |
| West Homestead | 95 | 1,759 | 1,868 | -1.23% | 1,908 | 0.92 | Borough |
| Wilmerding | 96 | 1,672 | 1,779 | -1.24% | 3,897 | 0.43 | Borough |
| Braddock | 97 | 1,636 | 1,720 | -1.03% | 2,906 | 0.56 | Borough |
| Braddock Hills | 98 | 1,624 | 1,729 | -1.28% | 1,713 | 0.95 | Borough |
| Edgeworth | 99 | 1,596 | 1,673 | -0.93% | 1,067 | 1.50 | Borough |
| Cheswick | 100 | 1,573 | 1,670 | -1.19% | 3,397 | 0.46 | Borough |
| Leet township | 101 | 1,531 | 1,619 | -1.1% | 1,019 | 1.50 | Township |
| Dravosburg | 102 | 1,516 | 1,610 | -1.24% | 1,569 | 0.97 | Borough |
| Springdale township | 103 | 1,444 | 1,534 | -1.16% | 641 | 2.25 | Township |
| Bell Acres | 104 | 1,437 | 1,507 | -0.97% | 268 | 5.35 | Borough |
| Frazer township | 105 | 1,415 | 1,164 | 7.03% | 151 | 9.34 | Township |
| East Deer township | 106 | 1,402 | 1,487 | -1.13% | 617 | 2.27 | Township |
| Oakdale | 107 | 1,394 | 1,478 | -1.21% | 2,972 | 0.47 | Borough |
| Versailles | 108 | 1,390 | 1,479 | -1.28% | 2,872 | 0.48 | Borough |
| Blawnox | 109 | 1,367 | 1,454 | -1.23% | 4,618 | 0.30 | Borough |
| Elizabeth | 110 | 1,330 | 1,392 | -0.89% | 3,878 | 0.34 | Borough |
| Heidelberg | 111 | 1,207 | 1,286 | -1.31% | 4,206 | 0.29 | Borough |
| Bradford Woods | 112 | 1,116 | 1,185 | -1.24% | 1,253 | 0.89 | Borough |
| Whitaker | 113 | 1,106 | 1,178 | -1.25% | 3,736 | 0.30 | Borough |
| Leetsdale | 114 | 1,098 | 1,162 | -1.17% | 1,099 | 1 | Borough |
| Neville township | 115 | 1,041 | 1,105 | -1.14% | 680 | 1.53 | Township |
| Lincoln | 116 | 871 | 930 | -1.36% | 181 | 4.80 | Borough |
| Sewickley Heights | 117 | 812 | 854 | -0.98% | 111 | 7.32 | Borough |
| North Irwin | 118 | 809 | 821 | -0.25% | 4,005 | 0.20 | Borough |
| Chalfant | 119 | 700 | 747 | -1.27% | 4,430 | 0.16 | Borough |
| Sewickley Hills | 120 | 684 | 693 | -0.29% | 277 | 2.47 | Borough |
| Pennsbury Village | 121 | 633 | 675 | -1.25% | 8,440 | 0.07 | Borough |
| Glen Osborne | 122 | 553 | 587 | -1.25% | 1,286 | 0.43 | Borough |
| Wall | 123 | 485 | 515 | -1.22% | 1,110 | 0.44 | Borough |
| Thornburg | 124 | 441 | 468 | -1.12% | 1,007 | 0.44 | Borough |
| Rosslyn Farms | 125 | 414 | 439 | -1.19% | 746 | 0.56 | Borough |
| West Elizabeth | 126 | 378 | 403 | -1.31% | 2,112 | 0.18 | Borough |
| Ben Avon Heights | 127 | 376 | 398 | -1.05% | 2,161 | 0.17 | Borough |
| Glenfield | 128 | 196 | 210 | -1.51% | 239 | 0.82 | Borough |
| Haysville | 129 | 77 | 82 | -1.28% | 445 | 0.17 | Borough |
Pittsburgh is the largest city in Allegheny County, with a population of 303,572.
Haysville is the smallest city in Allegheny County.
There are 129 cities in Allegheny County, Pennsylvania.