U.S. Constitution, Twenty-Sixth Amendment, Section 1
The right of citizens of the United States, who are eighteen years of age or older, to vote shall not be denied or abridged by the United States or by any State on account of age.
Notes
Bars the United States and any state from denying or abridging the right to vote of citizens of the United States who are eighteen years of age or older, on account of age. The protection covers voting by all citizens aged eighteen and over in federal and state elections alike.
Use as reference
Lexinter.net | U.S. Const. amend. XXVI, § 1 | https://laws.lexinter.net/constitution/us/amendment-26/section-1