11. Gerald Ford, 61 years, 26 days at Start of presidency
Gerald Ford (July 14, 1913 – December 26, 2006) was an American politician who served as the 38th president of the USA from August 1974 to January 1977. Before his accession to the presidency, Ford served as the 40th vice president of the USA from December 1973 to August 1974. Ford is the only person to have served as both vice president and president without being elected to either office by the United States Electoral College.
10. John Adams, 61 years, 125 days at Start of presidency
John Adams (October 30, 1735 – July 4, 1826) was an American statesman, attorney, diplomat, writer, and Founding Father who served as the second president of the USA from 1797 to 1801. Before his presidency he was a leader of the American Revolution that achieved independence from Great Britain, and also served as the first vice president of the USA.
9. Andrew Jackson, 61 years, 354 days at Start of presidency
Andrew Jackson (March 15, 1767 – June 8, 1845) was an American soldier and statesman who served as the seventh president of the USA from 1829 to 1837. Before being elected to the presidency, Jackson gained fame as a general in the United States Army and served in both houses of Congress. As president, Jackson sought to preserve the Union.
8. Dwight D. Eisenhower, 62 years, 98 days at Start of presidency
Dwight D. Eisenhower (October 14, 1890 – March 28, 1969) was an American army general and statesman who served as the 34th president of the USA from 1953 to 1961. During World War II, he was a five-star general in the United States Army and served as supreme commander of the Allied Expeditionary Forces in Europe. He was responsible for planning and supervising the invasion of North Africa in Operation Torch in 1942–43 and the successful invasion of France and Germany in 1944–45 from the Western Front.
7. Zachary Taylor, 64 years, 100 days at Start of presidency
Zachary Taylor (November 24, 1784 – July 9, 1850) was the 12th president of the USA, serving from March 1849 until his death in July 1850. Taylor previously was a career officer in the United States Army, rose to the rank of major general and became a national hero as a result of his victories in the Mexican–American War. His top priority as president was preserving the Union, but he died sixteen months into his term, before making any progress on the status of slavery, which had been inflaming tensions in Congress.
6. George H. W. Bush, 64 years, 222 days at Start of presidency
George H. W. Bush (June 12, 1924 – November 30, 2018) was an American politician who served as the 41st president of the USA from 1989 to 1993 and the 43rd vice president of the United States from 1981 to 1989. A member of the Republican Party, he held posts that included those of congressman, ambassador, and CIA director. His son George W. Bush became the 43rd president in 2001.
5. James Buchanan, 65 years, 315 days at Start of presidency
James Buchanan (April 23, 1791 – June 1, 1868) was the 15th president of the USA (1857–1861), serving immediately prior to the American Civil War. A member of the Democratic Party, he was the 17th United States Secretary of State and had served in the Senate and House of Representatives before becoming president.