Who was the oldest man to be elected as U.S. president? July 13, 2020 by Pamela Landy Ronald Reagan, at 69 in 1980 and at 73 in 1984, was the oldest man to be elected president. Related Answers What was the first watch tested for durability on television? Where did Sherman’s March to the Sea begin and end during the Civil War? Who was the youngest man to become president of the U.S.? Who said, “If nominated I will not run. If elected I will not serve”? Who was the first Speaker of the House to be elected president? Which vice presidents have been elected president by regular election?