Alys Williams (born May 28, 1994) is an American water polo player. She played for the United States women's national water polo team. She participated at the 2014 FINA Women's Water Polo World Cup, 2017 FINA Women's Water Polo World League, 2018 FINA Women's Water Polo World League, 2017 World Aquatics Championships, and 2019 World Aquatics Championships.