The 1840 United States presidential election in Maryland was held on November 9, 1840 as part of the 1840 United States presidential election. Voters chose 10 representatives, or electors to the Electoral College, who voted for President and Vice President.
Maryland voted for the Whig candidate, William Henry Harrison, over Democratic candidate Martin Van Buren, by a margin of 7.66%. As of 2020, this remains the only time in history that an incumbent Democratic president who served a full term has failed to carry any of Maryland's electoral votes in a reelection bid.
This was the first presidential election that Carroll County was able to vote in.
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Text from the Wikipedia article “1840 United States presidential election in Maryland”, available under CC BY-SA 4.0.