奥尔杜是土耳其的城市，也是奥尔杜省的首府，位于该国东北部，海拔高度4米，受副热带湿润气候影响，海拔高度5米，每年平均降雨量1,046毫米，2011年人口145,455。

• Pictures of the city
• Kotiora (Ordu)

Ordu (Turkish pronunciation: [ˈoɾdu]) is a port city on the Black Sea coast of Turkey, historically also known as Cotyora, and the capital of Ordu Province with a population of 202,310 in the city center . The city is world's largest hazelnut producer. While, hazelnut is the main source of economy, the city has small-sized industries and rapidly growing tourism in the recent years.