Lee Harvey Oswald (October 18, 1939 – November 24, 1963) was, according to three government investigations, the assassin of U.S. President John F. Kennedy, who was fatally shot on November 22, 1963, in Dallas, Texas.

A United States Marine who defected to the Soviet Union and later returned, Oswald was arrested on suspicion of killing Dallas police officer J. D. Tippit and later connected to the assassination of President Kennedy. Oswald denied any responsibility for the murders. Two days later on November 24, 1963, while being transferred under police custody from the city jail to the county jail, Oswald was shot and mortally wounded by Jack Ruby on live television.

In 1964, the Warren Commission concluded that Lee Harvey Oswald assassinated President Kennedy single-handedly, a conclusion also reached by prior investigations of the FBI and the Dallas Police Department. However, in 1979, the United States House Select Committee on Assassinations (HSCA) concluded, largely on the basis of disputed acoustic evidence, that Oswald assassinated Kennedy "probably as a result of a conspiracy." The HSCA agreed with earlier conclusions that the only two shots to have struck the president were fired by Oswald.