| Rank | City | 2000 Population | Growth Rate (Annual) |
|---|---|---|---|
| 1 | Philadelphia | 1,513,800 | -0.5% |
| 2 | Pittsburgh | 333,703 | -1.0% |
| 3 | Allentown | 106,595 | 0.1% |
| 4 | Erie | 103,659 | -0.5% |
| 5 | Reading | 81,309 | 0.4% |
| 6 | Scranton | 75,851 | -0.8% |
| 7 | Bethlehem | 71,283 | -0.1% |
| 8 | Lancaster | 56,768 | 0.2% |
| 9 | Altoona | 49,429 | -0.6% |
| 10 | Harrisburg | 48,879 | -0.6% |
| 11 | Wilkes-Barre | 42,984 | -1.0% |
| 12 | York | 41,261 | -0.2% |
| 13 | State College | 38,387 | -0.2% |
| 14 | Chester | 36,878 | -1.3% |
| 15 | Bethel Park | 33,472 | -0.1% |
| 16 | Norristown | 31,331 | 0.3% |
| 17 | Williamsport | 30,629 | -0.5% |
| 18 | Monroeville | 29,268 | 0.0% |
| 19 | Plum | 26,937 | 0.5% |
| 20 | New Castle | 26,271 | -0.8% |
| 21 | Easton | 26,220 | -0.1% |
| 22 | Lebanon | 24,430 | -0.2% |
| 23 | McKeesport | 23,919 | -0.8% |
| 24 | Johnstown | 23,818 | -1.6% |
| 25 | Hazleton | 23,261 | -0.9% |
| 26 | West Mifflin | 22,152 | -0.7% |
| 27 | Pottstown | 21,879 | 0.1% |
| 28 | Baldwin | 19,826 | -0.9% |
| 29 | Murrysville | 18,826 | – |
| 30 | Wilkinsburg | 18,674 | -1.2% |
| 31 | Carlisle | 18,144 | -0.1% |
| 32 | West Chester | 17,870 | -0.1% |
| 33 | Chambersburg | 17,838 | 0.5% |
| 34 | Sharon | 16,285 | -0.7% |
| 35 | Hermitage | 16,203 | 0.6% |
| 36 | Lansdale | 16,080 | -0.1% |
| 37 | Greensburg | 15,859 | -0.3% |
| 38 | Pottsville | 15,504 | -0.9% |
| 39 | Washington | 15,171 | -0.5% |
| 40 | Butler | 15,096 | -0.4% |
| 41 | Indiana | 14,996 | -0.3% |
| 42 | Phoenixville | 14,803 | -0.2% |
| 43 | New Kensington | 14,662 | -0.8% |
| 44 | Hanover | 14,573 | -0.1% |
| 45 | St. Marys | 14,471 | 0.3% |
| 46 | Whitehall | 14,428 | 0.0% |
| 47 | Dunmore | 14,311 | -0.7% |
| 48 | Kingston | 13,809 | -0.7% |
| 49 | Meadville | 13,668 | -0.5% |
| 50 | Ephrata | 13,183 | 0.6% |
| 51 | Lower Burrell | 12,594 | 0.3% |
| 52 | Uniontown | 12,421 | 0.1% |
| 53 | Bloomsburg | 12,347 | -0.1% |
| 54 | Munhall | 12,124 | -0.8% |
| 55 | Elizabethtown | 11,879 | 1.7% |
| 56 | Yeadon | 11,749 | -0.2% |
| 57 | Aliquippa | 11,638 | -1.5% |
| 58 | Oil City | 11,480 | -0.5% |
| 59 | Franklin Park | 11,425 | 1.3% |
| 60 | Emmaus | 11,309 | -0.1% |
| 61 | Lansdowne | 11,032 | -0.6% |
| 62 | Nanticoke | 10,917 | -1.5% |
| 63 | Coatesville | 10,871 | -0.3% |
| 64 | Berwick | 10,734 | -0.2% |
| 65 | Jeannette | 10,631 | -0.5% |
| 66 | Sunbury | 10,588 | -0.9% |
| 67 | Brentwood | 10,436 | -0.4% |
| 68 | Wyomissing | 10,424 | 3.2% |
| 69 | Columbia | 10,324 | -0.5% |
| 70 | Darby | 10,287 | -0.6% |
| 71 | Warren | 10,227 | -0.8% |
| 72 | Morrisville | 10,028 | -0.2% |
| 73 | Bristol | 9,942 | -0.4% |
| 74 | East Stroudsburg | 9,903 | 1.1% |
| 75 | Beaver Falls | 9,889 | -0.8% |
| 76 | Carbondale | 9,774 | -0.9% |
| 77 | Jefferson Hills | 9,705 | – |
| 78 | Swissvale | 9,621 | -0.9% |
| 79 | Waynesboro | 9,611 | -0.0% |
| 80 | Northampton | 9,399 | 0.7% |
| 81 | Economy | 9,354 | 0.0% |
| 82 | Dormont | 9,311 | -0.5% |
| 83 | Lock Haven | 9,141 | -0.1% |
| 84 | Bradford | 9,136 | -0.5% |
| 85 | Middletown | 9,104 | -0.0% |
| 86 | Connellsville | 9,063 | -0.3% |
| 87 | Lititz | 9,032 | 0.8% |
| 88 | Mechanicsburg | 9,025 | -0.5% |
| 89 | Lewistown | 8,983 | -0.9% |
| 90 | Latrobe | 8,970 | -0.6% |
| 91 | Quakertown | 8,930 | 0.1% |
| 92 | Perkasie | 8,842 | 1.0% |
| 93 | Old Forge | 8,776 | -0.1% |
| 94 | Bellevue | 8,770 | -0.5% |
| 95 | Ellwood City | 8,692 | -0.4% |
| 96 | Collingdale | 8,654 | -0.8% |
| 97 | Monessen | 8,647 | -1.3% |
| 98 | Pleasant Hills | 8,630 | -0.1% |
| 99 | Castle Shannon | 8,607 | -0.5% |
| 100 | Canonsburg | 8,602 | -0.6% |
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