| Sergei Diyev | |
| Fullname: | Sergei Valerianovich Diyev |
| Birth Date: | 21 April 1958 |
| Birth Place: | Poltava, Ukrainian SSR |
| Position: | Midfielder |
| Years1: | 1976–1977 |
| Caps1: | 57 |
| Goals1: | 2 |
| Years2: | 1978 |
| Caps2: | 7 |
| Goals2: | 0 |
| Years3: | 1978 |
| Caps3: | 9 |
| Goals3: | 0 |
| Years4: | 1979 |
| Caps4: | 40 |
| Goals4: | 1 |
| Years5: | 1980 |
| Caps5: | 18 |
| Goals5: | 1 |
| Years6: | 1980 |
| Caps6: | 20 |
| Goals6: | 2 |
| Years7: | 1981–1983 |
| Caps7: | 123 |
| Goals7: | 18 |
| Years8: | 1984 |
| Years9: | 1985–1989 |
| Caps9: | 230 |
| Goals9: | 24 |
| Years10: | 1992 |
| Caps10: | 1 |
| Goals10: | 0 |
| Years11: | 1993–1995 |
| Caps11: | 92 |
| Goals11: | 10 |
| Years12: | 1996–1999 |
| Caps12: | 33 |
| Goals12: | 1 |
| Manageryears1: | 2000 |
| Managerclubs1: | FC Chornomorets Sevastopol (caretaker) |
| Manageryears2: | 2009 |
| Managerclubs2: | FC Sevastopol (caretaker) |
| Manageryears3: | 2009–2010 |
| Manageryears4: | 2010 |
| Managerclubs4: | FC Sevastopol (assistant) |
| Manageryears5: | 2014–2015 |
Sergei Valerianovich Diyev (ru|Сергей Валерианович Диев; uk|Сергій Валеріанович Дієв; born 21 April 1958) is a Russian football manager and a former player who currently manages FC SKChF Sevastopol. He previously held Ukrainian citizenship.