Joseph Franz, Prince of Dietrichstein (28 March 1798 – 10 July 1858), was a German prince member of the House of Dietrichstein, Major general, 9th Prince (Fürst) of Dietrichstein zu Nikolsburg, Count of Proskau-Leslie, Baron (Freiherr) of Hollenburg, Finkenstein and Thalberg.
Born in St.
Petersburg, he was the only child of Franz Joseph, 8th Prince of Dietrichstein, and Countess Alexandra Andrejevna Shuvalova.