At what age are citizens eligible to vote for President in the United States?

Citizens in the United States become eligible to vote for President when they reach the age of eighteen. This age requirement is established by the 26th Amendment to the Constitution, which was ratified in 1971. The amendment was enacted to ensure that young citizens, particularly those who were being drafted to serve in the Vietnam War, had a voice in the electoral process. By lowering the voting age from twenty-one to eighteen, the amendment recognized the maturity of younger individuals and their capacity to participate in democracy.

In contrast, the other ages listed do not reflect the current voting age, as sixteen and twenty-one were both common ages for certain rights or activities in the past but are not applicable for voting eligibility according to the Constitution today. Twenty-five years old does not correspond to any specific voting right either; thus, eighteen stands as the universally recognized age for voters.