When were women first allowed to vote in the United States?

Women were first allowed to vote in the United States with the ratification of the 19th Amendment to the Constitution on August 18, 1920. This landmark achievement granted women the right to vote after a long struggle for suffrage that began in the mid-19th century. The movement for women's voting rights included significant activism and protests, and the approval of the 19th Amendment marked a pivotal moment in American history, signifying a broader shift toward gender equality. The other dates listed do not correspond to the granting of voting rights to women in the U.S.