| Rank | City | 2015 Population (Est.) | Growth Rate (Annual) |
|---|---|---|---|
| 1 | Philadelphia | 1,560,297 | 0.6% |
| 2 | Pittsburgh | 305,412 | -0.0% |
| 3 | Allentown | 119,104 | 0.2% |
| 4 | Erie | 99,452 | -0.6% |
| 5 | Reading | 87,812 | -0.1% |
| 6 | Scranton | 75,281 | -0.3% |
| 7 | Bethlehem | 75,135 | 0.1% |
| 8 | Lancaster | 59,302 | -0.0% |
| 9 | Harrisburg | 49,082 | -0.2% |
| 10 | Altoona | 45,558 | -0.4% |
| 11 | York | 43,865 | 0.1% |
| 12 | State College | 42,100 | 0.0% |
| 13 | Wilkes-Barre | 40,814 | -0.4% |
| 14 | Norristown | 34,484 | 0.1% |
| 15 | Chester | 34,133 | 0.1% |
| 16 | Bethel Park | 32,257 | -0.0% |
| 17 | Williamsport | 29,197 | -0.2% |
| 18 | Monroeville | 28,285 | -0.1% |
| 19 | Plum | 27,532 | 0.4% |
| 20 | Easton | 27,052 | 0.2% |
| 21 | Lebanon | 25,573 | 0.1% |
| 22 | Hazleton | 24,932 | -0.4% |
| 23 | Pottstown | 22,684 | 0.3% |
| 24 | New Castle | 22,575 | -0.8% |
| 25 | Chambersburg | 20,602 | 0.4% |
| 26 | Johnstown | 20,184 | -1.0% |
| 27 | West Mifflin | 20,175 | -0.2% |
| 28 | Murrysville | 20,162 | 0.1% |
| 29 | Baldwin | 19,740 | -0.0% |
| 30 | McKeesport | 19,561 | -0.2% |
| 31 | West Chester | 19,189 | 1.0% |
| 32 | Carlisle | 18,916 | 0.3% |
| 33 | Phoenixville | 16,599 | 0.2% |
| 34 | Lansdale | 16,487 | 0.3% |
| 35 | Hermitage | 16,118 | -0.2% |
| 36 | Wilkinsburg | 15,813 | -0.2% |
| 37 | Hanover | 15,454 | 0.3% |
| 38 | Bloomsburg | 14,727 | -0.2% |
| 39 | Greensburg | 14,571 | -0.5% |
| 40 | Franklin Park | 14,269 | 1.5% |
| 41 | Indiana | 14,194 | 0.4% |
| 42 | Pottsville | 13,940 | -0.7% |
| 43 | Whitehall | 13,896 | -0.1% |
| 44 | Ephrata | 13,837 | 0.8% |
| 45 | Dunmore | 13,791 | -0.5% |
| 46 | Sharon | 13,669 | -0.7% |
| 47 | Washington | 13,551 | -0.2% |
| 48 | Butler | 13,369 | -0.7% |
| 49 | Meadville | 13,238 | -0.3% |
| 50 | Coatesville | 13,164 | 0.1% |
| 51 | Kingston | 12,994 | -0.4% |
| 52 | New Kensington | 12,796 | -0.6% |
| 53 | St. Marys | 12,793 | -0.5% |
| 54 | Elizabethtown | 11,611 | 0.1% |
| 55 | Lower Burrell | 11,531 | -0.5% |
| 56 | Yeadon | 11,525 | 0.2% |
| 57 | Emmaus | 11,335 | 0.3% |
| 58 | Munhall | 11,305 | -0.2% |
| 59 | Jefferson Hills | 11,232 | 1.4% |
| 60 | Waynesboro | 10,760 | 0.5% |
| 61 | Darby | 10,695 | 0.0% |
| 62 | Lansdowne | 10,641 | 0.0% |
| 63 | Wyomissing | 10,472 | 0.0% |
| 64 | Columbia | 10,383 | -0.0% |
| 65 | Berwick | 10,316 | -0.4% |
| 66 | Nanticoke | 10,301 | -0.4% |
| 67 | Oil City | 10,227 | -0.8% |
| 68 | Uniontown | 10,064 | -0.8% |
| 69 | Northampton | 9,915 | -0.0% |
| 70 | Lock Haven | 9,862 | 0.2% |
| 71 | Sunbury | 9,736 | -0.4% |
| 72 | East Stroudsburg | 9,624 | -0.6% |
| 73 | Bristol | 9,595 | -0.3% |
| 74 | Brentwood | 9,563 | -0.2% |
| 75 | Warren | 9,410 | -0.8% |
| 76 | Jeannette | 9,400 | -0.7% |
| 77 | Lititz | 9,397 | 0.1% |
| 78 | Economy | 9,294 | 0.9% |
| 79 | Aliquippa | 9,244 | -0.5% |
| 80 | Mechanicsburg | 8,969 | -0.0% |
| 81 | Canonsburg | 8,924 | -0.2% |
| 82 | Swissvale | 8,906 | -0.2% |
| 83 | Quakertown | 8,881 | -0.3% |
| 84 | Middletown | 8,870 | -0.1% |
| 85 | Collingdale | 8,797 | 0.0% |
| 86 | Carbondale | 8,758 | -0.4% |
| 87 | Beaver Falls | 8,740 | -0.7% |
| 88 | Morrisville | 8,631 | -0.3% |
| 89 | Bradford | 8,552 | -0.6% |
| 90 | Dormont | 8,515 | -0.2% |
| 91 | Perkasie | 8,484 | -0.1% |
| 92 | Millersville | 8,482 | 0.9% |
| 93 | Doylestown | 8,307 | -0.2% |
| 94 | Bellevue | 8,300 | -0.2% |
| 95 | Lewistown | 8,297 | -0.1% |
| 96 | Pleasant Hills | 8,284 | 0.0% |
| 97 | Castle Shannon | 8,273 | -0.1% |
| 98 | Old Forge | 8,216 | -0.3% |
| 99 | Grove City | 8,215 | -0.3% |
| 100 | Latrobe | 8,129 | -0.6% |
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