| Guðmundur Hreiðarsson | |
| Fullname: | Guðmundur Sævar Hreiðarsson |
| Height: | 1.87 m |
| Birth Date: | 1960 10, df=yes |
| Position: | Goalkeeper |
| Years1: | 1979–1981 |
| Clubs1: | Haukar |
| Years2: | 1982–1983 |
| Clubs2: | Valur |
| Years3: | 1984 |
| Clubs3: | FH |
| Years5: | 1985–1987 |
| Clubs5: | Valur |
| Years6: | 1988–1989 |
| Clubs6: | Víkingur |
| Years7: | 1989–1990 |
| Clubs7: | TuRU Düsseldorf |
| Years8: | 1990–1993 |
| Clubs8: | Víkingur |
| Years9: | 1994–1995 |
| Clubs9: | Breiðablik |
| Years10: | 1996–1998 |
| Clubs10: | KR |
| Nationalyears1: | 1988 |
| Nationalteam1: | Iceland |
| Nationalcaps1: | 1 |
| Nationalgoals1: | 0 |
| Manageryears1: | 2000 |
| Managerclubs1: | Iceland (women) |
| Manageryears2: | 2008–2014 |
| Managerclubs2: | KR (goalkeeping coach) |
| Manageryears3: | 2015 |
| Managerclubs3: | ÍA (goalkeeping coach) |
| Managerclubs4: | Iceland (goalkeeping coach) |
| Manageryears5: | 2024– |
| Managerclubs5: | Republic of Ireland (goalkeeping coach) |
Guðmundur Sævar Hreiðarsson (born 5 October 1960) is a retired Icelandic football goalkeeper and later manager.[1]