Martial Étienne Mulsant (2 March 1797, Marnand, Rhône – 4 November 1880) was a French entomologist and ornithologist.

Initially employed in commerce, Mulsant wrote Lettres à Julie sur l'entomologie, suivies d'une description méthodique de la plus grande partie des insectes de France, ornées de planches... ("Letters to Julie on entomology, followed by a methodical description of the greatest part of the insects of France with, decorated plates..."), dedicated to his future wife, Julie Ronchivole.

In 1840, he published Histoire naturelle des Coléoptères de France, ("Natural History of the Coleoptera of France") with various other entomologists : Antoine Casimir Marguerite Eugène Foudras (1783–1859) and Claudius Rey (1817–1895), his former pupil.

It contained 4 text volumes, with a separate Atlas of colored plates in imperial quarto size (lg.4to) by Lyon-Geneve-Bale.

The Atlas is illustrated with 120 exceptional, fine, large hand-colored lithograph plates of the known species of hummingbirds.