Milaimys Marín is a Cuban freestyle wrestler. She won the gold medal in the girls' freestyle 73 kg event at the 2018 Summer Youth Olympics held in Buenos Aires, Argentina. She also won the gold medal in the women's 76 kg event at the 2021 Junior Pan American Games held in Cali, Colombia. In 2019, she was eliminated in her first match in the women's freestyle 76 kg event at the World Wrestling Championships held in Nur-Sultan, Kazakhstan. At the 2019 World U23 Wrestling Championship held in Budapest, Hungary, she won the gold medal in the 72 kg event.