Matti Mattsson (born 5 October 1993 in Pori, Finland) is a Finnish swimmer. At the 2012 Summer Olympics, he competed in the Men's 200 metre breaststroke, finishing in 17th place overall in the heats and failing to qualify for the semifinals. In Barcelona at the 2013 Swimming World Championships, he won bronze medal in Men's 200 metre breaststroke. He has qualified to represent Finland at the 2020 Summer Olympics.