Mauricio Fiol Villanueva (born March 26, 1994) is a Peruvian swimmer.

[1] At the 2012 Summer Olympics, he competed in the Men's 200 metre butterfly, finishing in 25th place overall in the heats, failing to qualify for the semifinals.

[2] He has also won a bronze medal in 1500 metre free in the 2012 Swimming World Cup in Moscow, Russia.

[3] Fiol won a silver medal at the 2015 Pan American Games in the 200 meter butterfly event, but was tested positive for stanozolol after the race.

[4] Fiol was stripped of his silver medal and disqualified from participating in the 2016 Olympics by the FINA and was banned for four years.