The men's 200 metre butterfly event at the 2001 World Aquatics Championships took place between 23 July – 24 July. Both the heats and semifinals were held on 23 July with the heats being held in the morning session and the semifinals being held in the evening session. The final was held on 24 July.

Final

Rank	Name	Nationality	Time	Notes
	Michael Phelps Michael Phelps Michael Fred Phelps is an American swimmer who has, overall, won 16 Olympic medals—six gold and two bronze at Athens in 2004, and eight gold at Beijing in 2008, becoming the most successful athlete at both of these Olympic Games editions...		1:54.58	WR
	Tom Malchow Tom Malchow Thomas James Malchow is a swimmer from the United States, who won a gold medal at the 2000 Summer Olympics and a silver medal at the 1996 Summer Olympics. He broke Denis Pankratov's world record in the 200 m butterfly in 2000.Malchow was also a captain of the U.S. Men's Swimming Team at the 2004...		1:55.28
	Anatoly Polyakov Anatoly Polyakov Anatoly Sergeyevich Polyakov is a butterfly swimmer from Russia, who won a bronze in the men's 200 metres butterfly event at the 2004 European Championships in Madrid, Spain. He represented his native country at two consecutive Summer Olympics, starting in 2000.-References:* *...		1:55.68
4	Franck Esposito Franck Esposito Franck Esposito is a former swimmer from France, who won the bronze medal in the 200 metres butterfly at the 1992 Summer Olympics in Barcelona...		1:55.71
5	Takashi Yamamoto		1:55.84
6	Denys Sylantyev Denys Sylantyev Denys Sylantyev is a Ukrainian swimmer, who won the silver medal at the 2000 Olympic Games in Sydney in the 200 m butterfly.He won the Mare Nostrum circuit three times: 2000, 2001 and 2002.-References:*...		1:56.71
7	Justin Norris Justin Norris Justin Neville Norris is an Australian butterfly and individual medley swimmer, who won the bronze medal in the 200 m butterfly at the 2000 Sydney Olympics....		1:57.18
8	Andrew Livingston Andrew Livingston Andrew Joseph Livingston is a butterfly stroke swimmer from the United States, who competed for Puerto Rico at the 2000 Summer Olympics and at the 2004 Summer Olympics....		1:58.68

Key: WR = World record