Marousi or Maroussi (Greek: Μαρούσι), also known as Amarousio (Αμαρούσιο), is a city and a suburb in the northeastern part of the Athens urban area, Greece.

Consequently the city's modern name derives from that of the goddess, Amarysia, which denotes the origin of the worship back in Amarynthos, Euboea.

The main thoroughfare is the Kifisias Avenue (part of the EO83 road), which connects Marousi with central Athens and the A6 toll motorway.

[citation needed] The main offices of the Greek subsidiaries of several multinational corporations, including Google,[4] Kodak, Bayer, Kimberly-Clark, Siemens, Takeda Pharmaceutical Company, Microsoft and Nestlé, and the ANT1 television studios are located in Marousi.

The Mall Athens, one of the largest shopping centres in southeastern Europe, is situated in the southwestern part of Marousi.