Kozani (Greek: Κοζάνη), is a city in northern Greece, capital of Kozani Prefecture and of West Macedonia periphery. It is located in the western part of Macedonia, in the northern part of Aliakmonas river valley. The city lies 710 meters above sea level, 15 kilometers north-west of the artificial lake Polyfytos, 120 km south-west of Thessaloniki, between the mountains Pieria, Vermio, Bourinos and Askio. Its population is estimated at about 50,000.