Afidnes (, or á¼ÂÃÂïôýñù, from the Middle Ages until 1919: ÃÂùÿÃÂÃÂúñ - Kiourka) is a small town in East Attica, Greece. Since the 2011 local government reform it is part of the municipality Oropos, of which it is a municipal unit. The municipal unit has an area of 34.638 km<sup>2</sup>. It is situated in the eastern foothills of the Parnitha mountains, 3 km southwest of Polydendri, 5 km southeast of Malakasa and 27 km north of Athens city centre. Afidnes has a station on the railway from Athens to Thessaloniki. The A1 motorway (Athens - Lamia - Thessaloniki) passes east of the town. It is part of Athens metropolitan area.
Ancient Aphidna was one of the twelve ancient towns of Attica. In Greek mythology, Aphidna was the place where Theseus left Helen after he had abducted her. The archaeological site of Aphidnae is small. It was excavated in the 19th century. 13 Middle Helladic tumuli have been found.
The municipal unit Afidnes consists of the following settlements:
Markopoulou has historically been an Arvanite settlement.