A presidential election was held in Illinois on November 2, 1840, as part of the 1840 United States presidential election. Voters chose five representatives, or electors to the Electoral College, who voted for President and Vice President.
Illinois voted for the Democratic candidate, Martin Van Buren, over Whig candidate William Henry Harrison. Van Buren won Illinois by a margin of 2.01%.
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Text from the Wikipedia article “1840 United States presidential election in Illinois”, available under CC BY-SA 4.0.