Ordu or Altinordu is a port city on the Black Sea coast of Turkey, historically also known as Cotyora or Kotyora, and the capital of Ordu Province with a population of 217,640 in the city center.

Ordu is famous for hazelnuts, producing about 25 percent of the worldwide crop. The province relies on the crop for up to 80% of its economic activity. Turkey as a whole produces about 75 percent of the world's hazelnuts. As of 1920, Ordu was one of the few producers of white green beans, which were exported to Europe. Ordu also had mulberry tree plantations for sericulture. Today, the city is partially industrialized and a member of the Anatolian Tigers with its 7 companies.

The Sagra factory shop, selling many varieties of chocolate-covered hazelnuts, is one of the town's attractions.

The Boztepe aerial tramway is another popular attraction which is set to become a modern symbol for the city.

Local music is typical of the Black Sea region, including the kemençe. The cuisine is primarily based on local vegetables and includes both typical Turkish dishes - such as pide and kebab - and more interesting fare such as plain or caramel 'burnt ice-cream'.

Places of interest include:

• Pasaoglu Konagi and Ethnographic museum - an ethnographic museum.
• Tasbasi Cultural Centre - a cultural centre
• Boztepe - a hill of 550 m (1,800 ft) overlooking the town from the west. Since June 2012, an aerial lift system provides an easy way of transportation between the city's coastline and the hilltop. The Ordu Boztepe Gondola can transport hourly 900 passengers up to the hilltop in 6.5 minutes.
• Old Houses of Ordu in the old city center
• Yali Camii, also called Aziziye Camii - a mosque
• Atik Ibrahim Pasa Camii, also called Orta Cami - a mosque built in 1770
• Eski Pazar Camii - a mosque with adjoining Turkish baths
• Efirli Camii - a mosque
• Cape Jason is an Archaeological site and a small peninsula facing the sea. Its name is derived from the Mythological leader Jason of the Argonauts.