The 19th Amendment Almost 100 years ago, on Aug. 18, 1920, the 19th Amendment to the U.S. Constitution was ratified. This amendment granted all American women the right to vote in local, state, and general elections. This right is known as women’s suffrage. Before the 19th Amendment, only four out of the then 48 states allowed women to vote in state and local elections: Wyoming (1869), Colorado …