Niels Grunenberg (born 30 March 1975) is a German Paralympic swimmer.

[1] He represented Germany at the 2008 Summer Paralympics and at the 2012 Summer Paralympics and he won the silver medal in the men's 100 metres breaststroke SB5 event in 2012.

[1] In 2013, he won the bronze medal in the men's 100 metre breaststroke SB5 event at the 2013 IPC Swimming World Championships held in Montreal, Quebec, Canada.

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