Thomas E. Dewey (1902–1971) was an American politician who served as Governor of New York from 1943 to 1954 and ran twice to become President of the United States.

Thomas Dewey may also refer to: Thomas Charles Dewey (1840–1926), President of the Prudential Assurance Company Thomas B. Dewey (1915–1981), American crime novelist Thomas E. Dewey Jr. (1932–2021), son of the governor, investment banker Thomas R. Dewey (born 1978), American actor, producer, and writer

See also Dewey (disambiguation)