| Casimir Reuterskiöld | |
| Birth Date: | 14 September 1883 |
| Birth Place: | Ljusdal, Sweden |
| Death Place: | Stockholm, Sweden |
| Height: | 173 cm |
| Sport: | Sports shooting |
| Event: | Pistol |
| Club: | FOK, Stockholm |
| Show-Medals: | yes |
Casimir Reuterskiöld (14 September 1883 – 25 December 1953) was a Swedish sport shooter who competed in the 1920 Summer Olympics.[1] He won a silver medal in the team free pistol competition and finished eighth individually.
Reuterskiöld was a career military officer. At the time of the 1920 Olympics he held a rank of captain and was one of the most experienced shooters in the Swedish pistol team, having won two bronze medals at the 1913 World Championships. He retired from the service as a major.