Anna Mikhaylovna Knoroz (Russian: Анна Михайловна Кнороз; née Chuprina; born 30 July 1970) is a retired Russian hurdler who specialised in the 400 metres hurdles. She won a bronze medal in the 400 m hurdles at the 1994 European Championships, and a gold medal in the 4 × 400 metres relay at the 1991 World Championships (ran in heats only). She also competed at the 1996 Atlanta Olympics. Her personal best time of 54.11 seconds, was achieved in July 1994 in Nice.