The men's 200 metre butterfly competition of the swimming events at the 1955 Pan American Games took place on 25 March.

[1][2] It was the first appearance of this event in the Pan American Games.

[3][4][5][6][7][8] This race consisted of four lengths of the pool, all lengths being in butterfly stroke.

[9] All times are in minutes and seconds.

The final was held on March 25.