Narcisse Théophile Patouillard (2 July 1854 – 30 March 1926) was a French pharmacist and mycologist.

[2] Patouillard was a practicing pharmacist for more than forty years, first in Poligny (1881–84), and later in Fontenay-sous-Bois (1884–85), Paris (1886–1898) and Neuilly-sur-Seine (beginning in 1898).

Patouillard is highly regarded for his taxonomical work in mycology, and during his career, he described numerous genera and species of fungi.

The following are some of the genera that he is the taxonomic authority of: Guepiniopsis, Hirsutella, Lacrymaria, Leucocoprinus, Melanoleuca and Spongipellis.

Over 100 of his publications involved studies of fungi from diverse locales such as Brazil, Java, Guadeloupe, Mexico, New Caledonia, the Gambier Islands, Philippines, et al.