| Rank | City | 1850 Population | Growth Rate (Annual) |
|---|---|---|---|
| 1 | Philadelphia | 121,376 | 2.6% |
| 2 | Spring Garden district | 58,894 | 7.8% |
| 3 | Northern Liberties district | 47,223 | 3.2% |
| 4 | Kensington district | 46,774 | 7.7% |
| 5 | Pittsburgh | 46,601 | 8.2% |
| 6 | Southwark district | 38,799 | 3.5% |
| 7 | Moyamensing district | 26,979 | – |
| 8 | Allegheny | 21,262 | 7.7% |
| 9 | Reading | 15,743 | 6.5% |
| 10 | Lancaster | 12,369 | 3.9% |
| 11 | Harrisburg | 7,834 | 2.7% |
| 12 | Pottsville | 7,515 | 5.6% |
| 13 | Easton | 7,250 | 4.1% |
In 1850, the largest city in Pennsylvania was Philadelphia, with a population of 121,376. The second largest city is Spring Garden district, with a population of 58,894.
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