Marousi (also known as Maroussi) is the seat of the Municipality of Marousi and is located in the heart of the Northern Sector of Athens, in the Athenian Field of Attica. Occupies an area of ​​13 and its population amounts to 72,333 inhabitants according to the 2011 census.

Historically based on the ancient Athmonon founded by King Kekropas to protect Athens from barbarian invasions and continuous settlement from antiquity until today, Marousi is famous for the appeal of its inhabitants to the ceramic arts and the worship of Artemis. of hunting, in the 7th century BC, the first beautiful neoclassical but also the promotion of the Olympic Games, with a distinguished athlete Spyros Louis.

The modern settlement develops at an altitude of 230 meters, 2 kilometers south of Kifissia and 11 kilometers northeast of the center of Athens, while it is surrounded by the regional municipalities of Penteli, Vrilissia, Psychiko, Nea Ionia, Heraklion and Heraklion.

The municipality participates in the Association for the Protection and Regeneration of Pentelikos (SPAP), in the Association of Municipalities of Northeast Athens (SVAP) and is home to major important Greek and multinational companies in the field of construction, financial services, telecommunications and retail. It is a reference point for all the inhabitants of the complex and is known worldwide for its rich cultural and sports infrastructure, with the most characteristic landmarks being the OAKA, the City Hall, the Art Gallery, the North Library and the busy transport hubs of Nezra.

The mayor since 2019 is Theodoros Abatzoglou.