Joan Margaret Monahan was a New Zealand swimmer who won a silver medal at the 1950 British Empire Games, and in 1956 became the first person to swim the length of Lake Rotoiti. She later competed in Masters swimming, breaking several world Masters records.
- Occupation
- swimmer, botanist, school teacher
- Citizenship
- New Zealand
- Born
- February 27, 1925
- Died
- April 6, 2004
