Rufus King (March 24, 1755April 29, 1827) was an American lawyer, politician, and diplomat. He was a delegate for Massachusetts to the Continental Congress. He also attended the Constitutional Convention and was one of the signers of the United States Constitution on September 17, 1787, in Philadelphia, Pennsylvania. He represented New York in the United States Senate, served as Minister to Britain, and was the Federalist candidate for both Vice President (1804, 1808) and President of the United States (1816).