| Office: | Russian Federation Senator from Crimea |
| Alongside: | Olga Kovitidi |
| Term Start: | 26 March 2014 |
| Predecessor: | Seat established |
| Office2: | Deputy Chair of the Supreme Council of Crimea |
| Term Start4: | 19 May 2006 |
| Term End4: | 5 October 2009 |
| Term Start3: | 19 March 2010 |
| Term End3: | 16 November 2010 |
| Term Start2: | 28 February 2014 |
| Term End2: | 26 March 2014 |
| Office5: | Chair of the Supreme Council of Crimea |
| Term Start5: | 10 May 1994 |
| Term End5: | 6 July 1995 |
| Predecessor5: | Mykola Bahrov |
| Successor6: | Yevheniy Suprunyuk |
| Office7: | Member of the Supreme Council of Crimea |
| Term Start7: | 10 May 1994 |
| Term End7: | 26 March 2014 |
| Office8: | People's Deputy of Ukraine |
| Term Start8: | 15 May 1990 |
| Term End8: | 10 May 1994 |
| Birth Date: | 28 September 1953[1] [2] |
| Birth Place: | Simferopol, Crimea Oblast, Russian SFSR, Soviet Union (now disputed) |
| Nationality: | Russian |
| Party: | Party of Regions (before 2014) United Russia (since 2014) |
Sergei Pavlovich Tsekov (uk|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.