John Flanagan is a professional triathlete and open water swimmer from Honolulu, Hawaii. He won the 2000 and 2001 Waikiki Roughwater Swims and the 7 km Hawaiian Christmas Looong Distance Invitational Rough-H2O Swims in 1998, 1999 and 2000. He coaches at the Kamehameha Swim Club on Oahu and was a former member of the USA Swimming National Open Water Swimming Team.
He was a gold medalist in the 5 km team competition at the 1998 FINA World Championships and a gold medalist in the 25 km team competition at the 1999 Pan Pacific Swimming Championships. He was the silver medalist in the 1500m freestyle at the 2000 Oceania Championships, got fourth place in the 10 km marathon swim at the 2001 FINA World Championships, finished 10th place in the 5 km race at the 2001 FINA World Championships and competed in the 2000 Meter Speed Crossing of the Yangtze River, in China in 2002.
He was inducted in the Hawaii Swimming Hall of Fame in the Class of 2005.
- Hawaiian Christmas Looong Distance Swim, The Double Roughwater
- Double The Distance, Twice As Nice
- Possibly Annual Hawaiian Christmas Looong Distance Invitational Rough-H2O Swim
- World Open Water Swimming Association
- Marathon Swimming
- Open Water Swimming
- Blast From The Past, The 2001 Waikiki Roughwater Swim
- Hawaii Swimming Hall of Fame Induction of John Flanagan
- Swimming With Aloha...Hawaii Swimming Hall Of Fame
- Where Are They Now? John Flanagan