Kalyvia Thorikou (Greek: Καλύβια Θορικού) is a town and a former municipality in East Attica, Greece.

[4] Kalyvia Thorikou consists of two distinct parts: the main inland town Kalyvia and the coastal settlement, which is also referred to as Lagonisi.

Kalyvia proper is situated on the south side of the Mesogaia plain, in the southeastern part of the Attica peninsula.

There are several low mountains around Kalyvia Thorikou, including Mount Paneion [el] to its south and Merenta to its northeast.

The Greek National Road 89 (Gerakas - Koropi - Lavrio - Sounio) passes east of the town.