How old must citizens be to vote for President?

Citizens must be eighteen years old to vote for President. This age requirement is established by the 26th Amendment to the United States Constitution, which was ratified in 1971. The amendment was a response to calls for lowering the voting age, particularly in light of the Vietnam War, where many young people were being drafted at the age of eighteen but were not allowed to vote. Therefore, the decision to set the voting age at eighteen ensures that citizens who are eligible to participate in national decisions, such as electing a President, are of an age where they can also be considered responsible for military service and other civic duties. By extending the right to vote to individuals who are eighteen or older, the amendment promotes greater involvement of younger citizens in the democratic process.