| Gunnar Steinn Jónsson | |
| Nationality: | Icelandic |
| Birth Date: | 4 May 1987 |
| Birth Place: | Akureyri, Iceland |
| Position: | Centre back |
| Currentclub: | Stjarnan |
| Clubnumber: | 27 |
| Years1: | –2009 |
| Clubs1: | HK Kópavogs |
| Years2: | 2009–2012 |
| Clubs2: | HK Drott |
| Years3: | 2012–2014 |
| Clubs3: | HBC Nantes |
| Years4: | 2014–2016 |
| Clubs4: | VfL Gummersbach |
| Years5: | 2016–2018 |
| Clubs5: | IFK Kristianstad |
| Years6: | 2018–2021 |
| Clubs6: | Ribe-Esbjerg HH |
| Years7: | 2021 |
| Clubs7: | Frisch Auf Göppingen |
| Years8: | 2021– |
| Clubs8: | Stjarnan |
| Nationalteam1: | Iceland |
| Nationalcaps1: | 36 |
| Nationalgoals1: | 30 |
Gunnar Steinn Jónsson (born 4 May 1987) is an Icelandic handball player for Stjarnan and the Icelandic national team.[1] [2]