Women's suffrage, or the right to vote, was established in the United States over the course of more than half a century, first in various states and localities, sometimes on a limited basis, and then nationally in 1920 with the ratification of the 19th Amendment to the United States Constitution.

Wyoming was the first place in the world to incorporate women's suffrage, although other jurisdictions had already given limited suffrage to women who met various property qualifications. A U.S. territory in 1869, Wyoming's first territorial legislature voted to give women the right to vote and to hold public office. A legislature made entirely of men passed the woman's suffrage bill in 1869 entitled "An Act to Grant to the Women of Wyoming Territory the Right of Suffrage, and to Hold Office.” The territory retained its woman suffrage law even when that law could have jeopardized the Wyoming Territory's application for statehood. In 1890, Wyoming became the first U.S. state allowing its woman citizens to vote.