Mandra (Greek: Μάνδρα), is a town and former municipality in West Attica, Greece.

In 2017, the area was badly hit from catastrophic floods, that resulted in 24 deaths in the entire region, but mainly in Mandra and Nea Peramos.

The western part of the municipal unit is covered by Mount Pateras.

The municipal unit also includes the villages of Néa Zoí, Ágios Sotír, Palaiochóri, Diódia, Pournári and several smaller settlements.

Mandra is bypassed by the Greek National Road 3 (Elefsis - Thiva).