34 years old.
John F Kennedy was 45 years old when he died.
John F. Kennedy died on November 22, 1963 (aged 46).
John F. Kennedy was 36 years old when his father, Joseph P. Kennedy Sr., died in 1969.
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John Kennedy Toole was born on December 17, 1937 and died on March 26, 1969. John Kennedy Toole would have been 31 years old at the time of death or 77 years old today.
John Fitzgerald Kennedy (May 29, 1917-November 22, 1963), he was 46.
John F. Kennedy Jr. died on July 16, 1999 at the age of 38.
John F. Kennedy died on November 22, 1963 at the age of 46.
William John Kennedy died in 2005.
John Stewart Kennedy died in 1909.
John Wilfred Kennedy died in 1949.