| Birth Date: | 10 May 1891 |
| Birth Place: | Malmö, Sweden |
| Death Date: | 11 February 1971 (aged 79) |
| Death Place: | Malmö, Sweden |
| Sport: | Wrestling |
| Club: | IK Sparta, Malmö |
| Show-Medals: | yes |
Ernst Hilding Waldemar Nilsson (10 May 1891 – 11 February 1971) was a Swedish heavyweight wrestler who competed at the 1912, 1920 and 1924 Summer Olympics.[1] He won a bronze medal in freestyle wrestling in 1920 and placed fourth-fifth in the Greco-Roman and freestyle contests in 1924. Nilsson won two world titles in Greco-Roman wrestling, in 1913 and 1922.