Sean Mahoney (born August 12, 1988) is an American former breaststroke swimmer.

A native of Rio Vista, California, Mahoney was a collegiate swimmer for West Virginia University and UC Berkeley.

[2] She was given a six-month suspension in 2010 after testing positive for the stimulant methylhexaneamine.

[3] At the 2011 Pan American Games in Guadalajara, Mahoney won a gold medal for the United States in the 200 m breaststroke, setting a games record in the process.

[4] Mahoney won four 200 m breaststroke meets in the 2012 FINA Swimming World Cup.