Melanie Ann Margalis-Fink (née Margalis; born December 30, 1991) is an American competitive swimmer who specializes in the freestyle, breaststroke and individual medley events.

[3] Margalis won gold in the 4x200-meter freestyle relay as a member of the preliminary team and bronze in the 200-meter individual medley at the 2013 World University Games in Kazan, Russia.

[2] At the 2016 Summer Olympics in Rio de Janeiro, Brazil Margalis won the gold medal with the U.S. women's 4x200-meter freestyle relay team.

[4][5] At the 2017 World Aquatics Championships Margalis had a strong swim in the 200-meter IM, but could not hold off the final 50 surge of US teammate Madisyn Cox, and finished fourth.

At the 2018 FINA World Swimming Championships (25 m) Margalis earned the silver medal in the 400-meter IM, turning in a career-best time of 4:25.84 in the event finals.

On Day 5, Margalis raced in the 4×200-meter free relay, where she split 1:55.81 to help USA to a new American record and silver medal behind Australia.

[2] In 2019 she was a member of the inaugural International Swimming League representing the Cali Condors, who finished third place in the final match in Las Vegas, Nevada in December.