Celalettin Arif (1875–1928) was a Turkish lawyer, politician, academic, government minister and diplomat.

After finishing the Soğukçeşme Military Middle School in Istanbul and Galatasaray High School, he studied law and political science in Paris, France.

Returned to Istanbul, he taught law and political science in colleges.

He co-founded the political party "Osmanlı Ahrar Fıkrası" ("Ottoman Liberty Party"), and was elected as a deputy from Istanbul into the Ottoman parliament in its 4th legislative term.

During the efforts of the War of Independence led by Mustafa Kemal Pasha, Celalettin Arif joined the Government of the Grand National Assembly in Ankara.