Anna Mikhaylovna Knoroz (; 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.