Mozaffar ad-Din Shah Qajar, (Persian: مظفرالدین شاه قاجار, Mozaffar Ŝāh-e Qājār, Muẓaffari’d-Dīn Shāh Qājār; 23 March 1853 – 3 January 1907) was the fifth Qajar dynasty king of Persia. He reigned between the years 1896 and 1907.
The son of the Qajar dynasty ruler Naser al-Din Shah Qajar, Mozaffar ad-Din was named crown prince and sent as governor to the northern province of Azerbaijan in 1861.