| Sergei Grichenkov | |
| Fullname: | Sergei Valeryevich Grichenkov |
| Birth Date: | 8 July 1986 |
| Birth Place: | Moscow, Russia |
| Position: | Defender |
| Youthclubs1: | PFC CSKA Moscow |
| Years1: | 2002–2006 |
| Caps1: | 0 |
| Goals1: | 0 |
| Years2: | 2006 |
| Caps2: | 23 |
| Goals2: | 0 |
| Years3: | 2007 |
| Caps3: | 14 |
| Goals3: | 0 |
| Years4: | 2008 |
| Clubs4: | FC Daugava |
| Caps4: | 11 |
| Goals4: | 1 |
| Years5: | 2009 |
| Caps5: | 21 |
| Goals5: | 0 |
| Years6: | 2010 |
| Clubs6: | FC Molniya Moscow |
| Years7: | 2012 |
| Clubs7: | FC Molniya Moscow |
| Years8: | 2013 |
| Clubs8: | FC Dzhileks Klimovsk |
| Years9: | 2013 |
| Clubs9: | FC Zenit Moscow |
| Years10: | 2014 |
| Clubs10: | FC Prialit Reutov |
Sergei Valeryevich Grichenkov (Russian: Серге́й Валерьевич Гриченков; born 8 July 1986) is a former Russian professional footballer.
He made his debut for PFC CSKA Moscow on 6 July 2005 in a Russian Cup game against FC Torpedo Vladimir. He made his first start on 15 March 2006 in the next Russian Cup round against FC Spartak Kostroma.
He played in the Russian Football National League for FC Sodovik Sterlitamak in 2007.