Franz Joseph, Prince of Dietrichstein (Franz Seraph Joseph Carl Johann Nepomuc Quirin; 28 April 1767 – 10 July 1854), was a German prince member of the House of Dietrichstein, Major general, 8th Prince (Fürst) of Dietrichstein zu Nikolsburg, Count of Proskau-Leslie, Baron (Freiherr) of Hollenburg, Finkenstein and Thalberg.
Born in Nikolsburg, he was the third child and second (but eldest surviving) son of Karl Johann Baptist, 7th Prince of Dietrichstein, and Maria Christina Josepha, a daughter of Jan Josef František AntonĂn, Count of Thun-Hohenstein.