Ella Eastin (born March 28, 1997) is an American retired swimmer specializing in the individual medley and butterfly events.

[3] At the 2016 NCAA Championships, she won the 200-yard and 400-yard individual medleys, and placed second behind Kelsi Worrell in the 200-yard butterfly.

[4] During the first day of the 2017 NCAA Championships, Eastin, along with her teammates Simone Manuel, Lia Neal, and Katie Ledecky, set a record of 6:45.91 in the 800-yard freestyle relay.

[5] In the 2019 NCAA Championships, Eastin won the 400-yard individual medley, and in so doing became the only woman to win four consecutive national titles in the event.

[6] She won silver in the women's 400 metre individual medley at the 2016 FINA World Swimming Championships (25 m).