Joseph Franz Maria Anton Hubert Ignatz Fürst und Altgraf zu Salm-Reifferscheidt-Dyck (4 September 1773 at Castle Dyck near Neuss – 21 March 1861 in Nice) was a German amateur botanist and owner of Castle Dyck. Dyck was a member of an important aristocratic family that had ruled a small territory until the mediatisation of small German states in the early 19th century. His wife, Constance de Salm, was a poet and miscellaneous writer. The standard author abbreviation Salm-Dyck is used to indicate this person as the author when citing a botanical name.