See main article: 1840 United States presidential election.
| Election Name: | 1840 United States presidential election in Pennsylvania |
| Country: | Pennsylvania |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1836 United States presidential election in Pennsylvania |
| Previous Year: | 1836 |
| Next Election: | 1844 United States presidential election in Pennsylvania |
| Next Year: | 1844 |
| Election Date: | October 30 – December 2, 1840 |
| Image1: | William Henry Harrison crop.jpg |
| Nominee1: | William Henry Harrison |
| Party1: | Whig Party (United States) |
| Home State1: | Ohio |
| Running Mate1: | John Tyler |
| Electoral Vote1: | 30 |
| Popular Vote1: | 144,010 |
| Percentage1: | 50.00% |
| Nominee2: | Martin Van Buren |
| Party2: | Democratic Party (United States) |
| Home State2: | New York |
| Running Mate2: | none |
| Electoral Vote2: | 0 |
| Popular Vote2: | 143,676 |
| Percentage2: | 49.88% |
| Map Size: | 300px |
| President | |
| Before Election: | Martin Van Buren |
| Before Party: | Democratic Party (United States) |
| After Election: | William Henry Harrison |
| After Party: | Whig Party (United States) |
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.
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%.
| 1840 United States presidential election in Pennsylvania[1] | |||||
|---|---|---|---|---|---|
| Party | Candidate | Votes | Percentage | Electoral votes | |
| Whig | William Henry Harrison | 144,010 | 50.00% | 30 | |
| Democratic | Martin Van Buren (incumbent) | 143,676 | 49.88% | 0 | |
| Liberty | James G. Birney | 340 | 0.12% | 0 | |
| Totals | 288,026 | 100.0% | 30 | ||