Lucien Désiré Joseph Courchet (31 July 1851, La Garde-Freinet – 10 March 1924) was a French botanist known for his work in the fields of plant anatomy and physiology.
In 1884 he received his agrégation, afterwards being appointed professor of botany at the École supérieure de pharmacie in Montpellier (1889).
As a taxonomist he was author of the plant genus Perriera (family Simaroubaceae).