All the Presidents in Age Order

  • Herbert Hoover and FDR
Herbert Hoover and FDR
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The ages of U.S. Presidents have varied significantly over the years, changing with voting demographics and shifting societal attitudes toward age. Younger presidential candidates have been seen as symbols of change and energy, appealing to young voters or people seeking a fresh perspective. Older candidates have often brought decades of experience and a sense of maturity. Here is a full list of the ages of the U.S. Presidents at the time of their inauguration, listed from oldest to youngest, spanning an almost 40-year age difference, from 42 to 78.

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Over 70 

When 46th President Joe Biden was sworn in on January 20, 2021, he became the oldest U.S. President to date, at 78 years and 61 days old. Just four years prior, the second-oldest President, Donald Trump, was sworn in at 70 years and 220 days old. He was about 15 years older than the overall average presidential age of 55. Biden’s term punctuated a trend of increasingly older Presidents: The average age of Presidents elected between 1875 and 1899 was 53, whereas the average age between the late 1990s and today is 63. When the Founding Fathers signed the Constitution in 1787, they set 35 years as the minimum age to run for President; at the time, it was seen as a mature age due to lower life expectancy in the 1700s. Meanwhile, the oldest national leader in the world today is Cameroon’s President Paul Biya, at 91. To date, just two U.S. Presidents have been over 70 years old when inaugurated.

- Joe Biden (46th President) — 78 years, 61 days
- Donald J. Trump (45th President) — 70 years, 220 days

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