Look up JFK in Wiktionary, the free dictionary.
John F. Kennedy (1917–1963) was the 35th president of the United States from 1961 to 1963.
Jack Kennedy may also refer to:
- Jack Kennedy (footballer, born 1873), Scottish international football player
- Jack Kennedy (footballer, born 1906), English football player
- Jack Kennedy (hurler), Irish forward
- Jack Kennedy (jockey) (born 1999), Irish jockey
- Jack Kennedy (train robber) (c. 1870–1922), American outlaw
- Uncle Jack Kennedy (1919–2005), activist and spokesman for Australian Aboriginal rights
- Kennedy (musician), American nu-disco musician and former member of the Silversun Pickups