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How Old Every US President Was During Their Term

Updated October 16, 2019 4.2k views44 items

Here are all 44 US presidents, ordered by their age at start of presidency. While the minimum age requirement for president is 35 years old, the average age of presidents when elected to office is 55 years and 3 months. In 2017, President Donald Trump became the oldest elected president at 70 years old; President Theodore Roosevelt still remains as the youngest elected president at 50 years old. 

Check out this list of US president ages - some might surprise you!

Photo:
  • James K. Polk
    Photo: Metaweb (FB) / Public domain

    Age at Start of Presidency: 49 years, 122 days (March 4, 1845)

    Age at End of Presidency: 53 years, 122 days (March 4, 1849)

    • Birthplace: Pineville, Mecklenburg County, United States of America, United States, with Territories
    • Presidency: 11
    • V.P.: George M. Dallas
  • Millard Fillmore
    Photo: Metaweb (FB) / Public domain

    Age at Start of Presidency: 50 years, 183 days (July 9, 1850)

    Age at End of Presidency: 53 years, 56 days (March 4, 1853)

    • Birthplace: Moravia, New York, United States of America
    • Presidency: 13
  • John Tyler
    Photo: NPGpics / flickr / CC-BY-NC-ND 2.0

    Age at Start of Presidency: 51 years, 6 days (April 4, 1841)

    Age at End of Presidency: 54 years, 340 days (March 4, 1845)

    • Birthplace: Charles City County, Virginia, United States of America
    • Presidency: 10
  • Calvin Coolidge
    Photo: NPGpics / flickr / CC-BY-NC-ND 2.0

    Age at Start of Presidency: 51 years, 29 days (August 2, 1923)

    Age at End of Presidency: 56 years, 243 days (March 4, 1929)

    • Birthplace: Plymouth Notch, Vermont, United States of America
    • Presidency: 30
    • V.P.: Charles G. Dawes