| Birth Date: | 4 March 1887 |
| Birth Place: | Neuilly-sur-Seine, France |
| Death Date: | 7 April 1953 (aged 65) |
| Death Place: | Rouen, France |
| Sport: | Cycling |
| Show-Medals: | yes |
Marcel Berthet (4 March 1887 – 7 April 1953) was a French cyclist who rode professionally between 1907 and 1923. He took part in the 1908 Tour de France, and set multiple records in one-hour ride in 1907, 1912 and 1913. He won the six-day race of Brussels in 1921 and finished second in 1920. His brother Ernest Berthet was also a competitive cyclist.