| Birth Date: | 24 July 1919 |
| Birth Place: | Moscow, Russia |
| Death Date: | 4 September 1993 (aged 74) |
| Death Place: | Moscow, Russia |
| Sport: | Greco-Roman wrestling |
| Club: | Spartak (1938–39) Dynamo (1941–53) |
| Coach: | A. P. Dyakonov |
| Show-Medals: | yes |
Semyon Ivanovich Marushkin (Russian: Семён Иванович Марушкин, 24 July 1919 – 4 September 1993) was a welterweight Greco-Roman wrestler from Russia who competed at the 1952 Summer Olympics. He won his first three bouts, but then lost to the eventual silver medalist Gösta Andersson and ended in a fourth place. Domestically he won the Soviet title in Greco-Roman (1950 and 1951) and freestyle wrestling (1947).
Marushkin fought in World War II, and after retiring from competitions had a long career as a wrestling coach and referee.