| Greg Harnett | |
| Position: | Defence |
| Shoots: | Left |
| Height Ft: | 5 |
| Height In: | 11 |
| Weight Lb: | 185 |
| Nll Draft: | 11th overall |
| Nll Draft Year: | 2011 |
| Nll Draft Team: | Calgary Roughnecks |
| Birth Date: | June 30, 1990 |
| Birth Place: | Toronto, Ontario, Canada |
| Career Start: | 2012 |
| Gender: | m |
| Former Nll Teams: | Calgary Roughnecks |
Greg Harnett (born June 30, 1990 in Toronto, Ontario) is a professional indoor lacrosse defenceman who plays for the Buffalo Bandits in the National Lacrosse League. He previously played for the Calgary Roughnecks, wearing #50.[1] He was drafted in the 2nd round (11th overall) in the 2011 NLL Entry Draft. After playing 9 years with the Roughneck, Harnett signed a 1-year contract with the Bandits prior to the 2023 season.[2]
Harnett's brother, Jon, is also a lacrosse player.