Mark David Turnbull OAM (born 11 October 1973) is an Australian sailor and Olympic champion.

He won a gold medal in the 470 Class with Tom King at the 2000 Summer Olympics in Sydney.

[1] He and King were inducted into the Australian Sailing Hall of Fame in 2022.

[2] Turnbull was educated at St. Leonard's College in Brighton East, Victoria, Australia.

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