Orsolya "Orsi" Ferenczy (born 25 June 1984) is a Hungarian former swimmer, who specialized in butterfly events. She captured a bronze medal from the European Junior Championships, and later represented Hungary, as a 16-year-old, at the 2000 Summer Olympics. Ferenczy also held a national record in the 100 m butterfly (1:00.37), until it was later broken by Beatrix Boulsevicz in 2003.