The Oldest and Youngest U.S. Presidents
Presidential Age Dynamics
The age at which U.S. presidents take office varies significantly. The youngest person to become president was Theodore Roosevelt, who was 42 years old when he took office in 1901. In contrast, the oldest person to become president was Joe Biden, who was 78 years old when he was sworn into office in 2021.
Top 10 Oldest Presidents
1. Joe Biden (age 78 at inauguration) 2. Ronald Reagan (age 69) 3. Donald Trump (age 70) 4. Dwight Eisenhower (age 62) 5. George H.W. Bush (age 64) 6. William Henry Harrison (age 68) 7. James Buchanan (age 65) 8. John Adams (age 61) 9. Zachary Taylor (age 65) 10. Millard Fillmore (age 50)
Youngest Presidents
* Theodore Roosevelt (age 42) * John F. Kennedy (age 43) * Ulysses S. Grant (age 46) * Rutherford B. Hayes (age 54) * James A. Garfield (age 49)
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