Helen Don Duncan is a competitive swimmer and backstroke specialist.

Don-Duncan represented Great Britain in the Olympics, FINA world championships, and European Championships, and swam for England in the Commonwealth Games. At the 2000 Olympic Games in Sydney, Australia, she came 15th in the women’s 200-metre backstroke.

Don-Duncan represented England and won a bronze medal in the 200 backstroke metres event, at the 1998 Commonwealth Games in Kuala Lumpur, Malaysia.

At the ASA National British Championships, she won four 200 metres backstroke titles in 1997, 1998, 1999, and 2000.

Helen Don-Duncan died on August 12, 2023, at the age of 42.