Marianne Vermaat (born 2 May 1955) is a former backstroke swimmer from the Netherlands, who competed for her native country at the 1972 Summer Olympics in Munich, West Germany. There she was eliminated in the semi-finals of the 100 m backstroke, clocking 1:09.11 (16th place).

Marianne Vermaat
Marianne Vermaat in 1971
Personal information
Born2 May 1955 (1955-05-02) (age 69)
Vlaardingen, the Netherlands
Height1.67 m (5 ft 6 in)
Weight63 kg (139 lb)
Sport
SportSwimming
ClubVZC, Vlaardingen
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