John F. Kennedy assassination conspiracy theories

The assassination of John F. Kennedy, the 35th president of the United States, on November 22, 1963, has spawned numerous conspiracy theories. These theories allege the involvement of the Central Intelligence Agency (CIA), the Mafia, Vice President Lyndon B. Johnson, Cuban Prime Minister Fidel Castro, the KGB, or some combination of these individuals and entities.

Some conspiracy theories have alleged a coverup by parts of the American federal government, such as the original investigators within the Federal Bureau of Investigation (FBI), the Warren Commission, or the CIA. The lawyer and author Vincent Bugliosi estimated that a total of 42 groups, 82 assassins, and 214 individuals had been accused at one time or another in various conspiracy scenarios.