| Orestas Buitkus | |
| Birth Date: | 1975 4, df=yes |
| Birth Place: | Klaipėda, Lithuanian SSR, Soviet Union |
| Position: | Midfielder |
| Years1: | 1996 |
| Years2: | 1997–1999 |
| Years3: | 2000–2004 |
| Years4: | 2005 |
| Years5: | 2008 |
| Years6: | 2010–2012 |
| Clubs1: | FBK Kaunas |
| Clubs2: | FC Baltika Kaliningrad |
| Clubs3: | Skonto FC |
| Clubs4: | Rubin Kazan |
| Clubs5: | Banga Gargždai |
| Clubs6: | FK Tauras Tauragė |
| Caps1: | 4 |
| Caps2: | 34 |
| Caps3: | 100 |
| Caps4: | 10 |
| Goals1: | 2 |
| Goals2: | 1 |
| Goals3: | 24 |
| Goals4: | 1 |
| Nationalyears1: | 1996–2003 |
| Nationalteam1: | Lithuania |
| Nationalcaps1: | 29 |
| Nationalgoals1: | 6 |
Orestas Buitkus (born 11 April 1975) is a Lithuanian former professional footballer. A midfielder, he stands 1.76 m tall and weighs 74 kg.
As of May 2006 Buitkus has scored 6 goals in 29 appearances for the Lithuania national team. He has previously played for Rubin Kazan, Skonto Riga, Baltika Kaliningrad, FBK Kaunas and Banga Gargždai. He last played for FK Tauras Tauragė.