Mehmed Abdulaziz or Abdulaziz Mehmed (26 September 1901 – 19 January 1977) was the 40th head of the Ottoman dynasty from 1973 to 1977. If reigning, he would have been Grand Sultan Abdulaziz II.
Prince Mehmed Abdulaziz was born at, Ortaköy Palace, Ortaköy, Istanbul the son of Prince Mehmed Seyfeddin, Rear Admiral of the Ottoman Navy and his first wife Georgian Necem Felek Hanım, and paternal grandson of Sultan Abdülaziz by his sixth wife.
He died in Nice and was buried there.
He was married in Cairo on 21 February 1929 to Berkemal Yegen Hanım, a descendant of Menliki Ahmad Pasha and Emine Zübeyde (sister of Muhammad Ali Pasha, Wāli of Egypt), and had one daughter Hürrem Abdulaziz.