| Oleh Kastornyi | |
| Fullname: | Oleh Viktorovych Kastornyi |
| Birth Date: | 1970 8, df=yes |
| Birth Place: | Kharkiv, Ukrainian SSR |
| Position: | Defender |
| Years1: | 1987–1995 |
| Years2: | 1995–1996 |
| Years3: | 1995 |
| Years4: | 1996–1997 |
| Years5: | 1998 |
| Years6: | 1999–2001 |
| Years7: | 2002 |
| Years8: | 2003–2004 |
| Clubs8: | FC Hazovyk-KhGV Kharkiv |
| Caps1: | 105 |
| Caps2: | 2 |
| Caps3: | 9 |
| Caps4: | 78 |
| Caps5: | 10 |
| Caps6: | 72 |
| Caps7: | 27 |
| Caps8: | 26 |
| Goals1: | 2 |
| Goals2: | 0 |
| Goals3: | 0 |
| Goals4: | 2 |
| Goals5: | 0 |
| Goals6: | 0 |
| Goals7: | 0 |
| Goals8: | 0 |
Oleh Viktorovych Kastornyi (uk|Олег Вікторович Касторний; born 29 August 1970) is a Ukrainian former professional footballer.
He made his professional debut in the Soviet Top League in 1990 for FC Metalist Kharkiv. He played 3 games and scored 1 goal in the 1998 UEFA Intertoto Cup for FC Baltika Kaliningrad.