The assassination of United States President John Fitzgerald Kennedy on 22 November 1963 remains one of the most studied and controversial events in modern American history. Kennedy's death, occurring during a presidential motorcade in Dallas, Texas, shocked the world and triggered decades of investigations, scholarly debates, and public speculation. The official investigations concluded that Lee Harvey Oswald was responsible for the shooting and acted alone, yet questions surrounding the evidence, intelligence failures, the motives of possible actors, and the possibility of a broader conspiracy have continued to shape historical discussion. This article examines the background of Kennedy's presidency, the events of the assassination, the official investigations, competing theories, and the continuing historical significance of the case.