Geertje Wielema (24 July 1934 – 18 August 2009) was a freestyle and backstroke swimmer from the Netherlands, who won the silver medal at the 1952 Summer Olympics in the 100 m backstroke.

In 1954 she won three medals at European championships and was named Holland's first female Sportspersonality of the Year.

[2] Between 1950 and 1954 she set five world records in medley relay and individual backstroke events.

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