Etiene Pires de Medeiros (born 24 May 1991) is a Brazilian competitive swimmer who participates in backstroke and freestyle events.
Widely regarded as the best Brazilian woman swimmer of all time, Medeiros was the first Brazilian to win an individual gold medal in a World Championship (long and short course) and Pan American Games, and the first to be a world record-holder in the modern era (only Maria Lenk in 1939 had accomplished this feat)