how old must one be to hold the office of president of the united states?
No person except a natural born Citizen, or a Citizen of the United States, at the time of the Adoption of this Constitution, shall be eligible to the Office of President; neither shall any person be eligible to that Office who shall not have attained to the Age of thirty five Years, and been fourteen Years a Resident within the United States. These requirements have been modified twice. Under the 12th Amendment, the same three qualifications were applied to the vice president of the United States. The 22nd Amendment limited office holders to two terms as president. Age Limits