The 19th Amendment to the U.S. Constitution guarantees the right to vote for all American women. The measure was proposed by Congress on June 4, 1919, but needed approval by three-quarters of the states in order to be ratified. On June 16, 1919, Ohio became the sixth state (after Illinois, Michigan, Wisconsin, Kansas and New York) to vote for ratification. The 19th Amendment was certified for ratification into the Constitution by Secretary of State Bainbridge Colby on August 26, 1920, after Tennessee provided the crucial 36th vote to approve the measure.

The Amendment was initially rejected by Georgia, Alabama, South Carolina, Virginia, Maryland, Mississippi, Delaware and Louisiana.

Image courtesy of the National Archives and Records Administration.