Cord Meyer IV (; November 10, 1920 – March 13, 2001) was a war veteran, a world federalist, a CIA official and a writer. After serving in World War II as a Marine officer in the Pacific War, where he was both injured and decorated, he led the United World Federalists in the years after the war. Around 1949, he began working for the CIA, where he became a high-level operative, retiring in 1977. After retiring from intelligence work in 1977, Meyer wrote as a columnist and book author. From 1945 to 1958, Meyer was married to Mary Pinchot, who was later romantically linked to President John F. Kennedy. Her murder in 1964, eleven months after Kennedy's assassination, remains unresolved.