Daniel O'Keeffe is a Guamanian former swimmer, who specialized in butterfly events. He is a two-time Olympian, and currently holds a Guamanian record in the 100-meter butterfly (55.05).
- Occupation
- swimmer
- Citizenship
- United States
- Born
- August 3, 1972
- Website
- http://www.aquaticsguam.com/biography/