Charles Jean Baptiste Collin-Mezin (1841–1923) was a French maker of violins, violas, cellos, basses and bows.

He was an Officier de l'Académie des Beaux-Arts and won gold and silver medals at the Paris Exhibitions in 1878, 1889, and 1900.

A number of famous violinists played on his instruments, and praised their quality and playability, including Joseph Joachim, Sivori, Scott Tixier, Léonard, Marie Tayau, and Jules Armingaud, who considered a Collin-Mezin equal to a Stradivari for flexibility of sound.

Like the best French luthiers, his designs followed in the tradition of the famous Italian schools Stradivarius, Guarnerius, and Amati, although he developed his own unique varnish.

Henley records that “Benjamin Godard's Concerto Romantique was first performed at a Pasedeloup Concert, Paris, 1876, by Marie Tayau on a Collin-Mézin violin with (what was then an innovation) E and A steel strings suggested by the maker, which rather points to the fact that he is attempting to get brilliance and clearness at the expense of purity."