| Sergei Agashkov | |
| Fullname: | Sergei Nikolaevich Agashkov |
| Birth Date: | 16 November 1962 |
| Birth Place: | Ashgabat, Turkmen SSR, Soviet Union |
| Height: | 1.87 m |
| Position: | Midfielder |
| Currentclub: | Academy Torpedo Moscow |
| Years1: | 1980–1983 |
| Years2: | 1984–1986 |
| Caps2: | 104 |
| Goals2: | 17 |
| Years3: | 1987–1991 |
| Caps3: | 131 |
| Goals3: | 14 |
| Years4: | 1992 |
| Clubs4: | POSCO Atoms |
| Caps4: | 3 |
| Goals4: | 0 |
| Years5: | 1993 |
| Caps5: | 6 |
| Goals5: | 2 |
| Years6: | 1993–1994 |
| Clubs6: | Ankaragücü |
| Caps6: | 23 |
| Goals6: | 2 |
| Years7: | 1994–1997 |
| Caps7: | 78 |
| Goals7: | 7 |
| Years8: | 1994–1997 |
| Caps8: | 17 |
| Goals8: | 0 |
| Totalcaps: | 356 |
| Totalgoals: | 40 |
| Manageryears1: | 1997 |
| Managerclubs1: | Torpedo Moscow (assistant) |
| Manageryears2: | 1999–2000 |
| Managerclubs2: | Torpedo-2 (assistant) |
| Manageryears3: | 2001–2004 |
| Managerclubs3: | Torpedo Moscow (U-21 assistant) |
| Manageryears4: | 2005 |
| Managerclubs4: | Torpedo Moscow (U-21) |
| Manageryears5: | 2006 |
| Managerclubs5: | Dinaburg |
| Manageryears6: | 2006–2007 |
| Managerclubs6: | Volga Tver |
| Manageryears7: | 2008–2017 |
| Managerclubs7: | FShM Moscow |
| Manageryears8: | 2024– |
| Managerclubs8: | Academy Torpedo Moscow |
Sergei Nikolaevich Agashkov (Russian: Сергей Николаевич Агашков; born 16 November 1962) is Turkmen football manager and a former player. Although he is from Turkmenistan, he is of Russian origin.
He had spells at SKA Rostov-on-Don, Torpedo Moscow, Beitar Tel Aviv, POSCO Atoms and Ankaragücü.
Agashkov played seven seasons in the Soviet Top League, two with SKA Rostov-on-Don and five with Torpedo Moscow. He later played four seasons in the Russian Premier League, all of them with Torpedo Moscow.