Oldest Presidents in U.S. History

Ronald Reagan
Ronald Reagan was in office until he was nearly 70 years old. Dirck Halstead/Liaison/Getty Images

Have you ever wondered who was the oldest President in U.S. history? Browse this list to discover who were the oldest - and youngest - Presidents.

  1. Ronald Reagan (69 years, 11 months, 14 days)
  2. William H. Harrison (68 years, 0 months, 23 days)
  3. James Buchanan (65 years, 10 months, 9 days)
  4. George H. W. Bush (64 years, 7 months, 8 days)
  5. Zachary Taylor (64 years, 3 months, 8 days)
  6. Dwight D. Eisenhower (62 years, 3 months, 6 days)
  1. Andrew Jackson (61 years, 11 months, 17 days)
  2. John Adams (61 years, 4 months, 4 days)
  3. Gerald R. Ford (61 years, 0 months, 26 days)
  4. Harry S. Truman (60 years, 11 months, 4 days)
  5. James Monroe (58 years 10 months, 4 days)
  6. James Madison (57 years, 11 months, 16 days)
  7. Thomas Jefferson (57 years, 10 months, 19 days)
  8. John Quincy Adams (57 years, 7 months, 21 days)
  9. George Washington (57 years, 2 months, 8 days)
  10. Andrew Johnson (56 years, 3 months, 17 days)
  11. Woodrow Wilson (56 years, 2 months, 4 days)
  12. Richard M. Nixon (56 years, 0 months, 11 days)
  13. Benjamin Harrison (55 years, 6 months, 12 days)
  14. Warren G. Harding (55 years, 4 months, 2 days)
  15. Lyndon B. Johnson (55 years, 2 months, 26 days)
  16. Herbert Hoover (54 years, 6 months, 22 days)
  17. George W. Bush (54 years, 6 months, 14 days)
  18. Rutherford B. Hayes (54 years, 5 months, 0 days)
  19. Martin Van Buren (54 years, 2 months, 27 days)
  20. William McKinley (54 years, 1 month, 4 days)
  1. Jimmy Carter (52 years, 3 months, 19 days)
  2. Abraham Lincoln (52 years, 0 months, 20 days)
  3. Chester A. Arthur (51 years, 11 months, 14 days)
  4. William H. Taft (51 years, 5 months, 17 days)
  5. Franklin D. Roosevelt (51 years, 1 month, 4 days)
  6. Calvin Coolidge (51 years, 0 months, 29 days)
  7. John Tyler (51 years, 0 months, 6 days)
  1. Millard Fillmore (50 years, 6 months, 2 days)
  2. James K. Polk (49 years, 4 months, 2 days)
  3. James A. Garfield (49 years, 3 months, 13 days)
  4. Franklin Pierce (48 years, 3 months, 9 days)
  5. Grover Cleveland (47 years, 11 months, 14 days)
  6. Barack Obama (47 years, 5 months, 16 days)
  7. Ulysses S. Grant (46 years, 10 months, 5 days)
  8. Bill Clinton (46 years, 5 months, 1 day)
  9. John F. Kennedy (43 years, 7 months, 22 days)
  10. Theodore Roosevelt (42 years, 10 months, 18 days)

* This list contains 43 U.S. Presidents rather than 44 because Grover Cleveland (who had two non-sequential terms in office) has not been counted twice.