Which amendment granted women the right to vote?

The 19th Amendment to the United States Constitution, ratified in 1920, is significant because it specifically granted women the right to vote, thus enfranchising half the population that previously lacked this essential democratic right. The movement for women's suffrage had been gaining momentum for decades prior, involving countless activists who fought for equality and suffrage rights. The ratification of this amendment marked a pivotal moment in American history, solidifying women's roles in the political sphere and ensuring that they could participate equally in elections.

The 16th Amendment relates to income tax, the 18th Amendment pertains to Prohibition, and the 21st Amendment repealed the 18th Amendment. None of those amendments concern voting rights for women, reinforcing the distinct importance of the 19th Amendment as a landmark achievement in the struggle for gender equality in the United States.