Anavyssos is a town and a former municipality in East Attica, Greece. It is situated near the Saronic Gulf coast, at the foot of the Olympos hill (487 m). It is 2 km north of Palaia Fokaia, 4 km east of Saronida, 10 km west of Lavrio and 34 km southeast
of Athens city centre. The Greek National Road 91 (Athens - Sounion) passes south of the town, along the coast.