Ellen Walshe (born 29 September 2001) is an Irish swimmer. She competed at the 2020 Summer Olympics in the 100 metre butterfly and the 200 metre individual medley. At the 2021 World Swimming Championships, she won the silver medal in the 400 metre individual medley. She was the first swimmer representing Ireland to win a medal higher than a bronze medal at a World Swimming Championships. Collegiately, she competes for the Tennessee Volunteers.