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.

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