Olga Turchak (Russian: Опъга Турчак; born 5 March 1967) is a retired female high jumper born in Almaty, Kazakhstan.

Turchak set her personal best on 7 July 1986, jumping 2.01 metres at a meet in Moscow, a mark that stood as the World Junior Record for 33 years, until being broken twice in a row by Yaroslava Mahuchikh in the 2019 World Championships.

She competed at two Olympic Games, reaching the final on both occasions.

Turchak set the Youth World Best Performance on September 7, 1984 in Donetsk, with a jump of 1.96 metres.

This biographical article relating to Kazakhstani athletics is a stub.