Show oldest youngest Youn gett presidents andrew jackson was the oldest man to occupy the presidency as he lacked but 11 days of being seventy years of age when his term expired william henry harrlson harrison was the oldest man to be inaugurated having entered his sixty ninth year only 0 aly i a few days before taking office and j he died only a month after his inauguration augu ration theodore roosevelt was the youngest man to become president being but forty two years of age at mckinless MCKIn leys death lie he was also the youngest to be elected ile he was forty six at that time |