Which amendment gave constitutional voting protection to American women in 1920?

The Nineteenth Amendment gave constitutional voting protection to American women in 1920.

The amendment prohibits the United States and its states from denying citizens the right to vote on the basis of sex. Congress approved it in 1919, and the required thirty-sixth state ratified it on August 18, 1920.

The amendment followed decades of organizing by women’s suffrage activists. Leaders including Susan B. Anthony, Elizabeth Cady Stanton, Ida B. Wells, and Carrie Chapman Catt used petitions, conventions, publications, marches, and civil disobedience to press for voting rights.

Ratification was a major national milestone, but it did not remove every barrier to voting. Many women of color continued to face discriminatory state laws, intimidation, and administrative obstacles, especially in the South. Broader enforcement of voting rights required later federal legislation and constitutional changes.