Kay Thi Win (born 26 May 1975) was a Burmese female weightlifter, competing in the 48 kg category and representing Myanmar at international competitions. She competed at world championships, most recently at the 1999 World Weightlifting Championships. She also competed at the Summer Olympics in 2000 in Sydney, Australia in the 48 kg category and narrowly missed out the podium placing fourth, with this performance she still remains as the best Burmese athlete in the entire history of the olympics.