Aridaía (Greek: Αριδαία, Macedonian: С'ботско, Bulgarian: Съботско) is a town and a former municipality in the Pella regional unit, Greece. Since the 2011 local government reform, it is part of the Almopia municipality, of which it is a municipal unit. It was the capital of the former Almopia eparchy. It is located in the northwest corner of the Pella regional unit, bordering the southern part of North Macedonia and the northeast corner of the Florina regional unit. Its land area is 562.910 km (217.341 sq mi). The population of Aridaia proper is 7,118, while that of the entire municipal unit is 18,864 (2021 census). The municipal unit is divided into 17 communities. Its largest other communities are Prómachoi (pop. 1,654), Loutráki (1,176) and Sosándra (1,008).
The community of Aridaia includes the settlement of Ydraia with a population of 500 inhabitants.
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