What US Presidents were assassinated?

Presidents who were assassinated and their assassins

Abraham Lincoln: April 14, 1865 by John Wilkes Booth
James Garfield: July 2, 1881 by Charles Guiteau
William McKinley: September 6, 1901 by Leon Czolgosz
John Kennedy: November 22, 1963 by Lee Harvey Oswald
 

More details on the assassinations

1) Abraham Lincoln was shot on April 14th, 1865 and died early on April 15, 1865. Booth was shot on April 26 in Virginia.
2) James Garfield was shot on July 2, 1881. He did not die until 2 months later, on September 19, 1881 and it is now believed that he died from blood poisoning due to poor medical treatment. Guiteau was tried, convicted, and hanged.
3) William McKinley was shot twice on September 6, 1901 and died September 14, 1901. Czolgosz was convicted and electrocuted.
4) John F. Kennedy was shot at 12:30 PM CDT November 22, 1965, and was dead on arrival at Parkland General Hospital in Dallas. Lee Harvey Oswald was shot and killed by Jack Ruby two days later.
 

Unsuccessful attempts at assassination

There have been about two dozen actual attempts on many other Presidents.
Andrew Jackson was not hurt after a man pointed two different pistols at him at close range and pulled their triggers, but miraculously they both failed to fire.
Theodore Roosevelt was shot while running again for President in 1912, and the bullet remained in him until his death in 1919. Ronald Reagan was shot two months after his inauguration in 1981, but fortunately survived the ricochet wound that penetrated his lung.
== Abraham Lincoln == The Abraham Lincoln assassination took place on Good Friday, April 14, 1865 at approximately 10:15 p.m. President Abraham Lincoln was shot by actor and Confederate sympathizer John Wilkes Booth while attending a performance of Our American Cousin at Ford's Theatre with his wife and two guests. Lincoln died the following day-April 15, 1865-at 7:22 a.m., in the home of William Petersen. === James A. Garfield === The James A. Garfield assassination took place in Washington, D.C., at 9:30 a.m. on July 2, 1881, less than four months after Garfield took office. Charles J. Guiteau was the assassin. Garfield died 11 weeks later, on September 19, 1881 due to infections caused by substandard medical care. === William McKinley === === John F. Kennedy === The assassination of John F. Kennedy took place on Friday, November 22, 1963, in Dallas, Texas, USA at 12:30 p.m. CST (18:30 UTC). John F. Kennedy was fatally wounded by gunshots while riding with his wife Jacqueline in a presidential motorcade through Dealey Plaza. Although Kennedy was not formally declared dead until half an hour after the shooting, he effectively died instantaneously. The ten-month investigation of the Warren Commission of 1963-1964 concluded that Kennedy was assassinated by Lee Harvey Oswald, an employee of the Texas School Book Depository in Dealey Plaza. The United States House Select Committee on Assassinations (HSCA) of 1976-1979 determined that Kennedy's murder was probably the result of a conspiracy that included Oswald.