Markku Koski (born 15 October 1981) is a Finnish professional snowboarder from Sievi. He is well known within the snowboarding community for his consistent showing in half-pipe competitions and for his video parts with Standard Films. Koski won the bronze medal at 2006 Winter Olympics in the Halfpipe competition, and he won a gold medal in the Big Air competition at the 2009 Snowboard World Championships.