Marko Tuomainen (born April 25, 1972 in Kuopio, Finland) is a professional ice hockey player who played in the National Hockey League and SM-Liiga. He played for KalPa, HIFK, Espoo Blues, Edmonton Oilers, Los Angeles Kings, and New York Islanders.
He played three years for KalPa Kuopio in Finland before joining Clarkson University in 1991. The Edmonton Oilers chose him 205th overall in the 1992 NHL Entry Draft and brought him up at the ned of Clarkson's 1994-95 season for five games.
An offer from the Los Angeles Kings in 1999 brought him back to North America and he played a full season for the Kings, scoring 9 goals and 8 assists in 63 games. He went back to the minors but did get into a few games with the Kings and the New York Islanders.
In 2002 he again returned to Finland to play for the Blues Espoo team for two years (2002 to 2004). He then played in Switzerland for five seasons. He played the 2009-10 season in Italy for Brunico SG.