What is the minimum age requirement for citizens to vote for President?

The minimum age requirement for citizens to vote for President is 18 years old, as established by the 26th Amendment to the United States Constitution. This amendment was ratified in 1971 and lowered the voting age from 21 to 18, highlighting the belief that if individuals are old enough to be drafted into military service and fight for their country, they should also have the right to participate in the electoral process.

The other age options listed do not meet this constitutional standard. Citizens as young as 16 or 21 years old cannot vote in presidential elections, and the age of 25 is irrelevant to any voting requirements for the presidency. The 18-year threshold reflects a significant change in societal views on youth involvement in governance and civic responsibility.