Sion D. Brinn (born 8 May 1973; pronounced "Sean") is a Jamaica-born former competition swimmer.

He won the 1998 ASA National Championship 100 metres freestyle title.

[1] As of 2016, he is the head coach of the swimming and diving teams at Indian River State College in Fort Pierce, Florida.

He was previously the head coach of the swimming and diving team at Wright State University in Dayton, Ohio.

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