| Rank | City | 1860 Population | Growth Rate (Annual) |
|---|---|---|---|
| 1 | Philadelphia | 565,529 | 16.6% |
| 2 | Pittsburgh | 49,221 | 0.5% |
| 3 | Allegheny | 28,702 | 3.0% |
| 4 | Reading | 23,162 | 3.9% |
| 5 | Lancaster | 17,603 | 3.6% |
| 6 | Harrisburg | 13,405 | 5.5% |
In 1860, the largest city in Pennsylvania was Philadelphia, with a population of 565,529. The second largest city is Pittsburgh, with a population of 49,221.
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