Mehmet Cavit Bey, Mehmed Cavid Bey or Mehmed Djavid Bey (1875–1926) was an Ottoman Sabbateaneconomist, newspaper editor and leading politician during the last period of the Ottoman Empire. A member of the Committee of Union and Progress (CUP), he was part of the Young Turks and had positions in government after the constitution was established. In the beginning of the Republican period, he was executed for alleged involvement in an assassination attempt against Mustafa Kemal.
Cavit was born in Salonica (Thessaloniki), then in the Salonica Vilayet of the Ottoman Empire. His father was Naim, a merchant, and his mother was Pakize; they were cousins. He was of Dönmeh descent.
Cavit was educated in economics in Constantinople (Istanbul). Following his graduation, he worked as a bank clerk and later as a teacher.
Later he became an economist and newspaper editor. Having returned to Salonica, Cavit Bey joined the Committee of Union and Progress (CUP). After the proclamation of the Second Constitution in 1908, he was elected deputy of Salonica and Kale-i Sultaniye (Çanakkale) into the parliament in Constantinople. Following the 31 March Incident in 1909, Cavit Bey was appointed minister of finance in the cabinet of Grand Vizier Tevfik Pasha.