Ashley Grace Twichell (born June 16, 1989) is an American competition swimmer who specializes in long-distance freestyle and open-water events.

[9] In July 2019 at the 2019 World Aquatics Championships in Gwangju, South Korea, Twichell qualified for her first Olympic Games.

[10][11] Twichell and her teammate Haley Anderson, who also competed in the race and finished in the top ten, were the first athletes qualifying to represent the United States at the 2020 Summer Olympics in any sport.

[14] At the Championships, she won a silver medal in the 1500-meter freestyle with a time of 16:18.11, finishing less than fourteen seconds behind gold medalist Bella Sims.

[16] In the women's 5 kilometer open water swim, Twichell finished first with a time of 1:01:31, winning the national title in the event.

In the 400-meter freestyle Twichell placed eighth with a time of 4:10.51 in the prelims heats and decided not to swim in the final even though she qualified.