How old do citizens have to be to vote for President?

Citizens must be at least 18 years old to vote for President. This age requirement is established by the 26th Amendment to the U.S. Constitution, ratified in 1971, which lowered the voting age from 21 to 18. This amendment reflects the idea that those who are mature enough to be drafted into military service should also have the right to participate in the democratic process by voting. Therefore, achieving the right to vote at 18 ensures that younger adults can engage in decisions that affect their lives and future. The other age thresholds mentioned, such as 16, 21, and 25, do not meet the current constitutional requirement for voting in federal elections, including for President.