Semyon Sergeyevich Antonov (Russian: Семён Сергеевич Антонов, born July 18, 1989) is a Russian professional basketball player for CSKA Moscow of the VTB United League.

He also represents the senior Russian national team, winning bronze medals at European and Olympic level.

[citation needed] On June 17, 2016, Antonov signed a two-year contract with the option of another year with the Russian team CSKA Moscow.

[citation needed] Antonov was a member of the junior national teams of Russia.

[citation needed] He has also been a member of the senior Russian national basketball team.