Tretyakov, Tretiakov (Russian: Третьяков) (masculine) or Tretyakova (Russian: Третьякова) (feminine) is a common Russian surname which means literally '[son] of the third child (son) in family'. Notable people with the surname include:
Aleksandr Tretyakov (skeleton racer) (born 1985), Russian skeleton racer
Vitaliy Tretyakov (born 1981), digital artist, illustrator, graphic designer
Nikolai Tretyakov (1854–1917), Russian general
Pavel Tretyakov (1832–1898), Russian businessman and art collector
Sergei Tretyakov (arts patron) died 1892, Russian art collector and patron, brother of Pavel
Sergei Tretyakov (writer) (1892–1937), Russian writer
Sergei Tretyakov (intelligence officer) (1956–2010), Russian spy and defector
Viktor Tretyakov (born 1946), Russian violinist and conductor
Vitaly Tretyakov (born 1953), Russian journalist
Valery Tretyakov (disambiguation), several people
