Hüseyin Rauf Orbay (27 July 1881 – 16 July 1964) was an Ottoman naval officer, Turkish statesman and diplomat.
Hüseyin Rauf was born in Istanbul in 1881 to an Abkhazian family. As an officer in the Ottoman Navy, he achieved fame for his actions as the captain of the cruiser Hamidiye during the First Balkan War. He was Chief of Naval Staff during World War I and by October 1918 was Minister of Marine and led the delegation that signed the Armistice of Mudros. Rauf Orbay also played a role in assisting Mustafa Kemal Atatürk in a near court-martial during a feud with Djemal Pasha and Enver Pasha.
On 31 October 1918, he signed Armistice of Mudros as the Minister of Navy, which ended the Ottoman Empire's participation in World War I. When the Turkish War of Independence began, he resigned from his position and went to Ankara to collaborate with Mustafa Kemal Atatürk. He was elected as a member of the representative committee in the Congress of Erzurum on 23 July 1919. He joined the Congress of Sivas as a delegate for Sivas on 4 September 1919 and was elected deputy chairman.