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Who was the youngest president of the United States?

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Theodore Roosevelt, Twenty-Sixth President of the United States

Theodore Roosevelt, Twenty-Sixth President of the United States

Credit: Library of Congress, Prints and Photographs Division, LC-USZ62-13026 DLC
Question: Who was the youngest president of the United States?
Answer: While many mistakenly say that John F. Kennedy was the youngest president of the United States, this is in error. He was the youngest president ever elected to the presidency at the age of 43. However, Theodore Roosevelt was the youngest man to serve as president when he took over after William McKinley's assassination. He was 42.

Here are the ages of the ten youngest presidents:

  • Theodore Roosevelt - 42 years, 322 days
  • John F. Kennedy - 43 years, 426 days
  • Bill Clinton - 46 years, 154 days
  • Ulysses Grant - 46 years, 236 days
  • Barack Obama - 47 years, 169 days
  • Grover Cleveland - 47 years, 351 days
  • Franklin Pierce - 48 years, 101 days
  • James Garfield - 49 years, 105 days
  • James K. Polk - 49 years, 122 days
  • Millard Fillmore - 50 years, 184 days

Now check out who was the oldest president of the United States?

Learn more about the US Presidents:

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