Diogo Villarinho (born 11 March 1994) is a Brazilian swimmer, who specialized in open water marathon.

[3] At the 2014 South American Games, in Santiago, he won a gold medal in the Team's 3 km,[4] and finished 4th in the Men's 10km.

[5] At the 2015 FINA World Championships in Kazan, he finished 21st in the 10 km marathon.

[6] Three days later, he won the silver medal in the Mixed 5km Team Event.

[8] At the 2019 World Aquatics Championships in Gwangju, South Korea, he finished 4th in the Open water swimming Team, 36th in the Men's 5 km marathon, and 22nd in the Men's 1500 metre freestyle.