| Sigurður Grétarsson | |
| Birth Date: | 1962 5, df=yes |
| Birth Place: | Iceland |
| Position: | Striker |
| Years1: | 1979–1980 |
| Clubs1: | Breiðablik |
| Caps1: | 34 |
| Goals1: | 24 |
| Years2: | 1980–1981 |
| Clubs2: | FC 08 Homburg |
| Caps2: | 16 |
| Goals2: | 4 |
| Years3: | 1981–1983 |
| Clubs3: | Breiðablik |
| Caps3: | 40 |
| Goals3: | 21 |
| Years4: | 1983–1984 |
| Clubs4: | Tennis Borussia Berlin |
| Years5: | 1984–1985 |
| Clubs5: | Iraklis F.C. |
| Caps5: | 26 |
| Goals5: | 10 |
| Years6: | 1985–1990 |
| Clubs6: | FC Luzern |
| Caps6: | 123 |
| Goals6: | 46 |
| Years7: | 1990–1993 |
| Clubs7: | Grasshopper |
| Caps7: | 65 |
| Goals7: | 5 |
| Years8: | 1996–1997 |
| Clubs8: | Valur |
| Caps8: | 11 |
| Goals8: | 2 |
| Years9: | 1998–2000 |
| Clubs9: | Breiðablik |
| Caps9: | 31 |
| Goals9: | 4 |
| Nationalyears1: | 1980–1992 |
| Nationalteam1: | Iceland |
| Nationalcaps1: | 46 |
| Nationalgoals1: | 8 |
| Manageryears1: | 1996–1997 |
| Managerclubs1: | Valur |
| Manageryears2: | 1998–2001 |
| Managerclubs2: | Breiðablik |
Sigurður Grétarsson (born 2 May 1962) is an Icelandic former footballer who played as a striker. After retiring, he worked as a football manager.
He is the older brother of former international player Arnar Grétarsson.
Sigurður started at Breiðablik and later became very successful in the Swiss League with Luzern and Grasshopper Zürich. He finished his playing career at his first club, Breiðablik, where he became player-manager.
He made his debut for Iceland in 1980 and went on to win 46 caps, scoring eight goals.[1] He played his last international match in a June 1993 World Cup qualifier against Russia.