| Headercolor: | lightblue |
| Gyda Ellefsplass Olssen | |
| Birth Date: | 16 November 1978 |
| Birth Place: | Elverum, Norway |
| Weight: | 590NaN0 |
| Sport: | Shooting |
| Event: | 10 m air rifle (AR40) 50 m rifle 3 positions (STR3X20) |
| Club: | Stange Sportsskyttere |
| Show-Medals: | yes |
Gyda Ellefsplass Olssen (born November 16, 1978, in Elverum) is a Norwegian sport shooter.[1] At age twenty-nine, Olssen made her official debut for the 2008 Summer Olympics in Beijing, where she competed in two rifle shooting events. She placed thirty-fourth out of forty-seven shooters in the women's 10 m air rifle, with a total score of 391 points.[2] Nearly a week later, Olssen competed for her second event, 50 m rifle 3 positions, where she was able to shoot 195 targets in a prone position, and 190 each in standing and in kneeling, for a total score of 575 points, finishing only in twenty-seventh place.[3]