Which of the following is NOT a requirement to vote in the U.S.?

The requirement of being a non-citizen is not a criterion for voting in the United States. In fact, voting is reserved for citizens only. To be eligible to vote, individuals must be citizens of the U.S., which generally means they were born in the U.S. or have gone through the naturalization process if they were born elsewhere.

In contrast, residency in a state is necessary because each state regulates its own voter registration and voting processes, and individuals must reside in that state to vote in its elections. Additionally, being at least eighteen years old is a federal law requirement established by the 26th Amendment, which ensures that all citizens are allowed to participate in elections once they reach adulthood. Thus, being a non-citizen clearly does not meet the legal requirements for voting in the U.S.