Sipke Taeke Castelein (born 14 April 1941) is a retired Dutch rower.

He competed at the 1964 Summer Olympics in the coxless fours, together with Jim Enters, Herman Boelen and Sjoerd Wartena, and finished in fourth place.

[1][2] He won a silver medal in the coxed pairs at the 1963 European Championships.

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