Adana is a city in Turkey and a major agricultural and commercial center. The city is situated on Seyhan River, 30 km. inland from Mediterranean Sea, in south-central Anatolia. It is the administrative seat of Adana Province and has a population of over 1.5 million, making it the fifth most populous city in Turkey. Adana-Mersin Metropolitan Area, with a population of 2.75 million, stretches over 100 kilometres from east to west and 25 kilometres from north to south; encompassing the cities of Mersin, Tarsus, Adana and Ceyhan. It is the fourth largest metropolitan area in Turkey and one of the country's leading centres of commerce and culture. Adana lies in the heart of the Çukurova plain, one of Turkey's largest centres of agricultural production, as well as a geographical and economical region that covers the provinces of Mersin, Adana, Osmaniye and Hatay.