Sergei Pavlovich Tsekov (Russian: Сергей Павлович Цеков, Ukrainian: Сергій Павлович Цеков; born 28 September 1953 in Simferopol^[3]) is a Russian and former Ukrainian politician, who serves as the Russian Federation Senator from Crimea since 2014.

A longtime pro-Russian activist, he voted against the ratification of the Ukrainian declaration of independence in 1991 while serving as a member of the Ukrainian Supreme Soviet, which was then succeeded by the Verkhovna Rada. He became the Chair of the legislature of his native Crimea in 1994, serving for one year. As an experienced member of the council, he was chosen by his successors as their deputy several times.^[4]

Tsekov was born on 28 September 1953 in Simferopol.

He graduated from the Medical Crimean Federal University, before pursuing a career in politics.

Tsekov was a key player on the Supreme Council of Crimea in the events following the 2014 Ukrainian Revolution, during which he refused to recognise the legitimacy of the new government that came to power and successfully pushed for the peninsula's integration with Russia. After the annexation, he was placed on the sanctions list of the United Kingdom and has since been added to similar lists of other countries.^[5]

Tsekov took office as a Russian Federation Senator in 2014 after being appointed to represent his region by the Supreme Council. Since 2019, he serves on the Committee on International Affairs.