Harper v. Virginia Board of Elections, 383 U.S. 663 (1966), was a case in which the U.S. Supreme Court found that Virginia's poll tax was unconstitutional under the equal protection clause of the 14th Amendment. In the late 19th and early 20th centuries, eleven southern states established poll taxes as part of their disenfranchisement of most blacks and many poor whites. The Twenty-fourth Amendment to the United States Constitution (1964) prohibited poll taxes in federal elections; five states continued to require poll taxes for voters in state elections. By this ruling, the Supreme Court banned the use of poll taxes in state elections.