Palaio Faliro, meaning "Old Phalerum", is a coastal district and a municipality in the southern part of the Athens agglomeration, Greece. At the 2011 census it had 64,021 inhabitants.
Palaio Faliro is situated on the east coast of the Phalerum Bay, a bay of the Saronic Gulf, 6 km southwest of Athens city centre. The municipality has an area of 4.574 km2. It is surrounded by other districts of Athens: Kallithea, Nea Smyrni, Agios Dimitrios and Alimos. The Pikrodafni stream flows into sea on the border of Palaio Faliro and Alimos.
The seaside area was redeveloped for the 2004 Summer Olympics, and now contains a seaside promenade, several sports venues, a marina and the Naval Tradition Park, where museum ships are exhibited.
The neighbourhoods of Palaio Faliro are Amfithea, Batis, Edem, Panagitsa, Floisvos, Palmyra, Pikrodafni, Agia Varvara and Kopsachila.