United States Senate special election in New York, 1802

The 1802 United States Senate special election in New York was held on February 9, 1802, by the New York State Legislature to elect a U.S. Senator (Class 3) to represent the State of New York in the United States Senate.

John Armstrong had been re-elected in January 1801 to a full term (1801–1807), but resigned on February 5, 1802. At the last state election, George Clinton had been elected Governor again, serving now his seventh term, and his Democratic-Republican Party had managed to win a large majority to the Assembly which could outvote the small Federalist Senate majority in a joint ballot. Aaron Burr accused the Clintons later to have hatched a scheme to seat DeWitt Clinton, the governor's nephew, in the U.S. Senate. Burr affirmed that Thomas Tillotson, a brother-in-law of Chancellor Robert R. Livingston like Armstrong, was appointed Secretary of State of New York in 1801 as part of a deal which required Tillotson to procure Armstrong's resignation.

At the State election in April 1801, the Democratic-Republican Party won a large majority in the Assembly, and half of the 12 State Senate seats up for renewal. The 25th New York State Legislature met from January 26 to April 5, 1802, at Albany, New York.

State Senator DeWitt Clinton ran as the candidate of the Democratic-Republican Party.

Ex-State Senator (1794–1795) Matthew Clarkson was the Federalist candidate.

Clarkson was nominated by the Senate, Clinton by the Assembly. The Legislature then proceeded to a joint ballot, and Clinton was elected. This was the first time that a joint ballot was necessary to choose between the nominees of different majorities in the houses of the Legislature.

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