| Election Name: | 1857 Pennsylvania gubernatorial election |
| Country: | Pennsylvania |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1854 Pennsylvania gubernatorial election |
| Previous Year: | 1854 |
| Next Election: | 1860 Pennsylvania gubernatorial election |
| Next Year: | 1860 |
| Image1: | File:WilliamPacker.jpg |
| Party1: | Democratic Party (United States) |
| Nominee1: | William F. Packer |
| Popular Vote1: | 188,846 |
| Percentage1: | 52.0% |
| Nominee2: | David Wilmot |
| Party2: | Republican Party (United States) |
| Popular Vote2: | 146,139 |
| Percentage2: | 40.2% |
| Image3: | File:Isaac Hazlehurst.jpg |
| Nominee3: | Isaac Hazlehurst |
| Party3: | Know Nothing |
| Popular Vote3: | 28,168 |
| Percentage3: | 7.8% |
| Map Size: | 300px |
| Governor | |
| Before Election: | James Pollock |
| Before Party: | Whig Party (United States) |
| After Election: | William F. Packer |
| After Party: | Democratic Party (United States) |
The 1857 Pennsylvania gubernatorial election occurred on October 13, 1857. Incumbent governor James Pollock, a Whig, was not a candidate for re-election. Democratic candidate William F. Packer defeated Republican candidate David Wilmot and American Party candidate Isaac Hazlehurst to become Governor of Pennsylvania.