| Sergei Vasyanovich | |
| Fullname: | Sergei Aleksandrovich Vasyanovich |
| Birth Date: | 8 July 1982 |
| Position: | Midfielder |
| Youthclubs1: | Smena St. Petersburg |
| Years1: | 2000 |
| Years2: | 2001–2003 |
| Years3: | 2002–2003 |
| Years4: | 2004–2005 |
| Years5: | 2006 |
| Clubs5: | FC Petrotrest St. Petersburg |
| Caps1: | 21 |
| Caps2: | 7 |
| Caps3: | 33 |
| Caps4: | 47 |
| Caps5: | 20 |
| Goals1: | 0 |
| Goals2: | 1 |
| Goals3: | 5 |
| Goals4: | 1 |
| Goals5: | 5 |
Sergei Aleksandrovich Vasyanovich (Russian: Серге́й Александрович Васянович; born 8 July 1982) is a former Russian professional footballer.
He made his professional debut in the Russian Second Division in 2000 for FC Zenit-2 St. Petersburg.