Rianne Guichelaar (born 16 August 1983) is a water polo player of the Netherlands who represents the Dutch national team in international competitions.

The Dutch team failed to qualify for the 2004 Summer Olympics and finished 10th at the 2005 World Aquatics Championships in Montreal.

The Dutch team finished in fifth place at the 2008 Women's European Water Polo Championship in Málaga and they qualified for the 2008 Summer Olympics in Beijing.

[1] There they ended up winning the gold medal on 21 August, beating the United States 9-8 in the final.

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