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.
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Text from the Wikipedia article “1857 Pennsylvania gubernatorial election”, available under CC BY-SA 4.0.