Joseph-Théodore Deck (1823–1891) was a 19th-century French potter. Born in Guebwiller, Haut-Rhin, he began learning the trade in his early 20s, moving to Paris at age 24. In 1856 he established his own faience workshop, and began to experiment with the Islamic style of ceramic making, and in particular the Iznik style. In the 1880s he also worked in the Chinese tradition, also collaborating with Raphaël Collin.
In 1887 he published a treatise under the title La Faïence.