John Adams
Adams died on July 4, 1826 of Heart Failure. This was the same day that Thomas Jefferson died, and was also exactly 50 years after the Declaration of Independence was signed in 1776. At 90, John Adams was the longest lived president of the United States until Ronald Reagan surpassed him in October 2001. John Adams was also a longest lived Vice President of the United States until Levi P. Morton surpassed him in 1915 and later by John Nance Garner in 1959.