Margaretha Maria "Gretha" Tromp (born 21 February 1964) is a retired Dutch sprinter and hurdler.

She competed at the 1988 Summer Olympics in the 100 m hurdles, 400 m hurdles and 4×100 metres relay, but failed to reach the final in any event.

[1] She won two medals at the 1991 Summer Universiade.

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