Santiago Grassi

Santiago Grassi (born 25 September 1996) is an Argentine swimmer. He competed at the 2016 Summer Olympics in the men's 100 metre butterfly; his time of 52.56 seconds in the heats did not qualify him for the semifinals. He represented Argentina again at the 2020 Summer Olympics in the men's 100 metre butterfly event.

Career
He won the silver medal in the men's 100 metre butterfly event at the 2015 Pan American Games.