Jacoba Cornelia "Co" Stelma (2 July 1907 – 30 August 1987) was a Dutch gymnast. She won the gold medal as a member of the Dutch gymnastics team at the 1928 Summer Olympics. She was born in The Hague and died in Brielle.

Olympic medal record
Women's gymnastics
Representing the  Netherlands
Gold medal – first place 1928 Amsterdam Team

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