Margaritha Constantia "Mariette" Van Heerden (born 22 November 1952) is a Zimbabwean former discus thrower and shot puter.

She was awarded Springbok colours during the years of the international sports boycott of South Africa.

[1] Van Heerden competed in the discus at the 1984 Summer Olympics, representing Zimbabwe.

Van Heerden also competed in the shot put at the 1982 Commonwealth Games.

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