. . . on August 26, 1920, the 19th Amendment was adopted which granted women the right to vote. While it took more than 70 years from the first public appeal to the final ratification, the suffrage movement did finally win enough support and women were allowed to vote. The amendment says, “The right of citizens of the United States to vote shall not be denied or abridged by the United States or by any state on account of sex.”
For a kid-friendly take on the history of women’s voting, I recommend Elaine Landau’s Cornerstones of Freedom:Women’s Right to Vote (2005).