A total of 13 states and territories—including Colorado (1893), Utah (1870), Idaho (1896), Washington (1910), Oregon (1912), Arizona (1912), Kansas (1912), California (1911), Montana (1914), Nevada (1914), New York (1917), Michigan (1918), and South Dakota (1918)—allowed women to vote before the ratification of the Nineteenth Amendment to the U.S. Constitution in 1920, which gave women the right to vote nationwide.