|Administrative region||West Macedonia|
|• Municipal unit||4,100|
|Time zone||EET (UTC+2)|
|• Summer (DST)||EEST (UTC+3)|
Mesopotamia (Greek: Μεσοποταμία, Macedonian Slavic: Четирок, Četirok) is a former municipality in Kastoria regional unit, West Macedonia, Greece. Since the 2011 local government reform it is part of the municipality Kastoria, of which it is a municipal unit. population 4,100 (2001).
The municipality was also known as Aliakmonas, named after the river Aliakmonas. The town of Mesopotamia was the seat of the municipality of Aliakmonas.
Mesopotamia has three Byzantine style churches. The most recent and largest is that of the cathedral of St. Peter and St. Paul. The oldest church is the church of St.Constantine and St.Helen which contains the village cemetery, and the church of Saint Demetrios. The chapel of St. George is a few kilometers outside of the village.
There is a Cultural Center as well. This center supports and preserves the λοψαλ culture. It holds annual ceremonies on May 19, a day of remembrance for the population, at the Forest of Mesopotamia near the Aliakmon River. Finally, the town also has bars and nightclubs.
Mesopotamia is a rural residential community. Its economy is entirely dependent on the agriculture of wheat. It also houses small private fur industry that is outsourced from the major fur traders of Kastoria. As the seat of the Aliakmonas municipality, Mesopotamia contains the Aliakmonas Municipal Building. It also contains a pharmacy, and a supermarket. The community of Mesopotamia has recently been linked to a branch of Northern Greece's brand new Egnatia Odos highway.
Mesopotamia has a football (soccer) team called Astrapi Mesopotamia or simply Astrapi (Grk.Αστραπή)and its origin year is believed to be in the mid-1950s, 1956-1957. It hosts games at the Municipal stadium of Mesopotamia.
- De Facto Population of Greece Population and Housing Census of March 18th, 2001 (PDF 39 MB). National Statistical Service of Greece. 2003.
- Kallikratis law Greece Ministry of Interior (Greek)