|Regional unit||West Athens|
|o Municipality||22.655 km2 (8.747 sq mi)|
|Elevation||95 m (312 ft)|
|o Municipality density||2,100/km2 (5,400/sq mi)|
|Time zone||UTC+2 (EET)|
|o Summer (DST)||UTC+3 (EEST)|
The municipality has an area of 22.655 km2. The geography of the municipality of Haidari is diverse: the eastern part, where the town Haidari is situated, is densely populated and forms a continuous built up area with the inner suburbs of central Athens. The rocky Aigaleo hills run through the central part of the municipality. The pine forest of Dafni and the Daphni Monastery lie on the eastern slopes of Aigaleo. The westernmost part of Haidari is the small industrial port town Skaramagkas, on the Saronic Gulf near Eleusis. The main roads of Haidari are the Greek National Road 8 (the old road from Athens to Corinth) and the Iera odos.
The Haidari concentration camp (Greek , stratópedo syngéntrosis Chaidaríou, German: KZ Chaidari) was a concentration camp operated by the German Schutzstaffel in Haidari during the Axis Occupation of Greece from September 1943 to September 1944.
The camp is now a monument to the Greek Resistance.