Chalandri (Greek: Χαλάνδρι, Ancient Greek: Φλύα, Phlya) is a suburb in the northern part of the Athens agglomeration, Greece. It is a municipality of the Attica region.
The municipality has an area of 10.805 km2. Chalandri was a small village until the rapid expansion of Athens during the 1960s and 1970s. Its built-up area is now continuous with those of the neighbouring suburbs Filothei, Marousi, Vrilissia, Agia Paraskevi, Cholargos, Neo Psychiko and Psychiko. Nevertheless, it has still a high ratio of open green areas per citizen in the Athens agglomeration. Several embassies are based in Chalandri. It is one of the largest suburbs in terms of population, with more than 70,000 residents. It holds an independent municipality status since 1944.
Chalandri is served by the Chalandri metro station.