The Nineteenth Amendment (Amendment XIX) to the United States Constitution prohibits the states and the federal government from denying the right to vote to citizens of the United States on the basis of sex. It was adopted on August 18, 1920.
The amendment was the culmination of the women's suffrage movement in the United States, which fought at both state and national levels to achieve the vote. It effectively overruled Minor v. Happersett (1875), in which a unanimous Supreme Court ruled that the Fourteenth Amendment did not give women the right to vote. Since the 1860s, an increasing number of states had given women the right to vote, but several states still denied women the right to vote at the time the amendment was ratified.
The Nineteenth Amendment was originally introduced in Congress in 1878 by Senator Aaron A. Sargent. Forty-one years later, in 1919, Congress submitted it to the states for ratification. It was ratified by three-fourths of the states a year later, with Tennessee's ratification being the last needed to add the amendment to the Constitution. In Leser v. Garnett (1922), the Supreme Court rejected claims that the amendment was unconstitutionally adopted.