Oleg Alekseyevich Protopopov (Russian: Оле́г Алексе́евич Протопо́пов; born 16 July 1932) is a former Russian pair skater who represented the Soviet Union. With his wife Ludmila Belousova he is a two-time Olympic champion (1964, 1968) and four-time World champion (1965–1968). In 1979 the pair defected to Switzerland and became Swiss citizens in 1995. They continued to skate at ice shows and exhibitions through their seventies.