Viktor Stepanovich Chernomyrdin (Russian: Ви́ктор Степа́нович Черномы́рдин) (born 9 April 1938) is a Russian politician. Chernomyrdin was Prime Minister of Russia from 1992 to 1998. Since 2001, he has been Russia's ambassador to Ukraine.

Chernomyrdin's father was a labourer. Viktor was one of his five children. Chernomyrdin completed school education in 1957 and found employment as a mechanic in an oil refinery in Orsk. He worked there until 1962, except for two years of compulsory military service from 1957 to 1960. His other occupations on the plant during this period included machinist, operator and chief of technical installations.

He became a member of the CPSU in 1961.