| GeoNames Home | Postal Codes | Download / Webservice | About |
| Name | Population | Latitude/Longitude | |
|---|---|---|---|
| 1 | Philadelphia | 1,517,550 | 39.952 / -75.164 |
| 2 | Pittsburgh | 319,494 | 40.441 / -79.996 |
| 3 | Allentown | 105,519 | 40.608 / -75.49 |
| 4 | Erie | 99,801 | 42.129 / -80.085 |
| 5 | Reading | 79,799 | 40.336 / -75.927 |
| 6 | Bethlehem | 73,710 | 40.626 / -75.37 |
| 7 | Scranton | 73,206 | 41.409 / -75.662 |
| 8 | Lancaster | 54,735 | 40.038 / -76.306 |
| 9 | Levittown | 53,117 | 40.155 / -74.829 |
| 10 | Harrisburg | 47,840 | 40.274 / -76.884 |
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