| Thorstein Johansen | |
| Birth Date: | 7 January 1888 |
| Birth Place: | Oslo, Norway |
| Death Place: | Oslo, Norway |
| Sport: | Sports shooting |
| Show-Medals: | yes |
Thorstein Arthur Johansen (7 January 1888 - 2 August 1963) was a Norwegian rifle shooter who competed in the early 20th century.[1]
He participated in shooting at the 1920 Summer Olympics in Antwerp and won the gold medal in team 100 m running deer, double shots. He was also a member of the Norwegian trap team which finished seventh in the team clay pigeons event.[2]