Agios Konstantinos (Greek: Άγιος Κωνσταντίνος meaning Saint Constantine, before 1954: Καμάριζα - Kamariza[2]) is a village and a former community in East Attica, Greece.

Agios Konstantinos is situated in the hills in the southeastern part of the Attica peninsula, at about 160 m elevation.

[4] There are several mines in the vicinity of Agios Konstantinos and neighboring Lavrio.

In antiquity it was known for silver mines, currently minerals including azurite, chalcoalumite, calcite, austinite and adamite are found.

The community Agios Konstantinos also includes the village Esperídes (pop.