Rosemary Peres Ribeiro (born March 17, 1958) is a former international butterfly swimmer from Brazil, who participated in a Summer Olympics for her native country.

[1] At 13 years old, in the 1971 Pan American Games, in Cali, she won a bronze medal in the 4×100-metre freestyle.

[3] Participated at the inaugural World Aquatics Championships in 1973 Belgrade, where she finished 18th in the 100-metre butterfly.

[7] She was at the 1975 Pan American Games, in Mexico City, where she won two bronze medals, in the 200-metre butterfly, and in the 4×100-metre freestyle.

[10] At the 1976 Summer Olympics, in Montreal, she swam the 100-metre and 200-metre butterfly, not reaching the finals.