Grevena is a town and municipality in Western Macedonia, Northern Greece, capital of the Grevena regional unit. The town's current population is 13,374 citizens (2011). It lies about 400 kilometres from Athens and about 180 km from Thessaloniki. The municipality's population is 25,905. Grevena has had access to the Egnatia Odos since the early 2000s, which now connects Igoumenitsa with Thessaloniki and Alexandroupoli at the border with Turkey. Mountains surround the municipality, which is situated by the river Greveniotikos, which itself flows into the Aliakmon. Other significant towns in the municipality are Amygdaliés and Méga Seiríni. Grevena Municipal Museum is located in the town.