Tõnu Tõniste (born 26 April 1967) is an Estonian Olympic sailor.

He competed in four consecutive Summer Olympics, starting in 1988, winning a silver and a bronze medal in the men's 470 class, for the Soviet Union (silver, 1988) and for Estonia (bronze, 1992).

Now he is sailing in team Lenny in the Melges 24 class.

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