The prefecture of Attica is the most densely populated prefecture of Greece, where it belongs in the capital Athens and the largest port in Greece, the port city of Piraeus.
Geographically the Attica Prefecture is divided into two major subsections, the capital region and the rest of Attica. The capital region includes the city of Athens (Piraeus with) and bounded by the Saronic Gulf and the mountains of Parnitha, Hymettus and Penteli, defining the Attica basin. The extent of the capital region is 427 chlm2 covers 11.2% of the total area of the Attica region and constantly rising standard of limits outside the area basi.