Olga Vladimirovna Nazarova (Russian: ????? ???????????? ????????), born 1 June 1965) is a Russian former athlete who competed mainly in the 400 metres.
She represented the Soviet Union.
She won two Olympic gold medals in the 4 x 400 metres relay, in 1988 and 1992.
Her 1988 split time of 47.8, remains one of the fastest relay splits of all-time.
She also won World Championship gold (1991) and silver (1987) in the relay, and a 1988 Olympic bronze medal in the 400 metres.