Joseph-Théodore Deck (2 January 1823 – 15 May 1891) was a 19th-century French potter, an important figure in late 19th-century art pottery. 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 (earthenware) workshop, Joseph-Théodore Deck Ceramique Française, and began to experiment with styles from Islamic pottery, and in particular the Iznik style.