Marco Orsi (born 11 December 1990) is an Italian competitive swimmer who won eight gold medal at the European Short Course Swimming Championships.
In 2012 Marco Orsi qualified for his first Olympic appearance in London 2012. He is trained by Roberto Odaldi. He competed in the men's 50 m freestyle, and was part of the Italian men's freestyle relay team. At the 2016 Summer Olympics, he was part of the Italian men's freestyle relay team.