Whitney North Seymour Jr. (July 7, 1923 – June 29, 2019), known to friends as Mike Seymour, was an American politician and attorney from New York City. Born to a prominent family, Seymour graduated from Princeton University and Yale Law School and served in the United States Army during World War II. He served in the New York State Senate from 1966 to 1968 and as U.S. Attorney for the Southern District of New York from 1970 to 1973.