Andriy Serdinov (born 17 November 1982) is a Ukrainian swimmer, who competed in the 2000 Olympics, 2004 Olympics and the 2008 Olympics. Serdinov also won the bronze medal in the 100 m butterfly at the 2004 Summer Olympics. Serdinov was also the world record holder in this event, which stood for approximately five minutes. He broke Michael Klim's mark during the semifinals of the World Championships in Barcelona, Spain, in 2003, only to have Michael Phelps break it in the next semifinal. It was later again broken by Ian Crocker in the final, the day after. In 2003 he won two golds at the Summer Universiade, in the 50 m and 100 m butterfly.