Sergey Aleksandrovich Martynov (Russian: Сергей Александрович Мартынов; born 22 August 1959) is a Russian statesman who serves as a senator from Mari El since 7 October 2019.

[2] Martynov was born on 22 August 1959 in Shatki, Nizhny Novgorod Oblast.

In 1982, he graduated from the Peter the Great St. Petersburg Polytechnic University.

In 2003–2010, he was the Head of the Human Resources and Public Service Administration of the Governor of St. Petersburg Valentina Matviyenko.

[1][3] As of October 19, 2022, Martynov was under personal sanctions introduced by the European Union, the United Kingdom, the USA, Canada, Switzerland, Australia, Ukraine, New Zealand, for ratifying the decisions of the "Treaty of Friendship, Cooperation and Mutual Assistance between the Russian Federation and the Donetsk People's Republic and between the Russian Federation and the Luhansk People's Republic"and providing political and economic support for Russia's annexation of Ukrainian territories.