Pefka (), also known as Retziki (), is a suburb and a former municipality in the Thessaloniki regional unit of Macedonia, Greece. Since the 2011 local government reform it is part of the municipality Neapoli-Sykies, of which it is a municipal unit. It has a land area of 1.800 km<sup>2</sup> and a population of 13,435 (2021).
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