Oskar Nilsson (equestrian) should not be confused with Oscar Nilsson (equestrian).
| Birth Date: | 25 January 1897 |
| Birth Place: | Ringarum, Sweden |
| Death Date: | 29 March 1958 (aged 61) |
| Death Place: | Norrköping, Sweden |
| Sport: | Horse riding |
| Club: | K1 IF, Stockholm |
| Show-Medals: | yes |
Oskar Petrus Nilsson (25 January 1897 – 29 March 1958) was a Swedish vaulter who competed in the 1920 Summer Olympics.[1] He was part of the Swedish team that won the bronze medal in vaulting. In the individual vaulting competition he finished sixteenth, one place ahead of his compatriot Oscar Nilsson.