1963-1969
He was 56 years old when he was elected president.
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Lyndon B. Johnson served from November 22, 1963 to January 20, 1969 as the 36th President of the U.S. He had previously been John F. Kennedy's Vice President.
Lyndon B. Johnson served from Nov. 1963 - Jan. 1969, about five years and two months.
See website: Lyndon B. Johnson
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He died of a massive heart attack in 1973, a little less than 4 years after leaving office.
President Lyndon Baines Johnson died of a massive heart attack on January 22, 1973.
The Vice President, Lyndon B. Johnson
Lyndon B. Johnson was the only president sworn into office on an airplane.
The 36th President of the United States was Lyndon B. Johnson from November 22, 1963 to January 20, 1969