The 1840 United States presidential election in Pennsylvania took place between October 30 and December 2, 1840, as part of the 1840 United States presidential election. Voters chose 30 representatives, or electors to the Electoral College, who voted for President and Vice President.

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1840 United States presidential election in Pennsylvania

← 1836 October 30 – December 2, 1840 1844 →

Nominee William Henry Harrison Martin Van Buren Party Whig Democratic Home state Ohio New York Running mate John Tyler none Electoral vote 30 0 Popular vote 144,010 143,676 Percentage 50.00% 49.88%

County Results Harrison   50-60%   60-70%   70–80% Van Buren   50-60%   60-70%   70-80%   80-90%

President before election Martin Van Buren Democratic Elected President William Henry Harrison Whig

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Pennsylvania voted for Whig challenger William Henry Harrison over Democratic incumbent Martin Van Buren by just 334 votes, a margin of 0.12%. It is the narrowest margin of victory in a presidential election in Pennsylvania history, with Donald Trump's 2016 win following close behind at 0.72%.

• List of United States presidential elections in Pennsylvania