West Macedonia is one of the thirteen peripheries of Greece. It is also one of the 3 parts of the region of Macedonia and particularly the western. It contains 4 perfectures: Florina, Kozani, Kastoria and Grevena. It borders with Thessaly and Epirus to the west and Central Macedonia to the east. It also borders with two countries in the north: Albania and the Republic of Macedonia. It has a total population of 303,857 inhabitants according to the 2001 census. Its capital and biggest city is Kozani.