| Sergei Korchagin | |
| Fullname: | Sergei Viktorovich Korchagin |
| Birth Date: | 28 July 1975 |
| Birth Place: | Kyubyshev, Russian SFSR |
| Position: | Midfielder |
| Years1: | 1995–1998 |
| Caps1: | 18 |
| Goals1: | 0 |
| Years2: | 1997 |
| Clubs2: | → FC Neftyanik Pokhvistnevo (loan) |
| Caps2: | 18 |
| Goals2: | 5 |
| Years3: | 2000–2001 |
| Caps3: | 37 |
| Goals3: | 3 |
| Years4: | 2004 |
| Clubs4: | FC Lokomotiv Samara |
| Years5: | 2005 |
| Clubs5: | FC Yunit Samara (amateur) |
Sergei Viktorovich Korchagin (ru|Сергей Викторович Корчагин; born 28 July 1975 in Kuybyshev) is a former Russian football player.