Cassie Wild (born 12 June 2000) is a British swimmer. She competed in the women's 50 metre backstroke event at the 2020 European Aquatics Championships, in Budapest, Hungary.
Wild is from Chester and she is a student at the University of Stirling. Wild was named as a member of the British team to go to the postponed 2020 Olympics in April 2021. This would be her first Olympics where she would join an "exceptionally high quality team" including more experienced British Olympians including Aimee Willmott and Molly Renshaw.