At what minimum age are U.S. citizens eligible to vote for President?

U.S. citizens are eligible to vote for President at the minimum age of eighteen (18) years old. This standard was established by the 26th Amendment to the Constitution, which was ratified in 1971. The amendment was a response to the argument that if individuals were old enough to be drafted for military service at eighteen, they should also have the right to vote. This legislative change ensured that the voting age was uniformly set across the country, reinforcing the principle of democratic participation by allowing younger citizens to have a voice in their government and its leadership.