This article does not cite any sources. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.Find sources: "Omonoia, Athens" – news · newspapers · books · scholar · JSTOR (June 2009) (Learn how and when to remove this template message)
Night view of Omonoia Square.
Night view of Omonoia Square.
Location within Athens municipality
Location within Athens municipality
Coordinates: 37°59′2″N 23°43′40″E / 37.98389°N 23.72778°E / 37.98389; 23.72778Coordinates: 37°59′2″N 23°43′40″E / 37.98389°N 23.72778°E / 37.98389; 23.72778
Postal code
104 xx, 105 xx

Omonoia (Greek: Ομόνοια pronounced [oˈ]) is a neighborhood in downtown Athens, Greece, centered on the square of the same name and served by the Omonoia station of the Athens Metro. Historically the heart of the city, it has experienced serious urban decay in recent years, becoming plagued by drug dealing, prostitution and theft, especially in its western part. Despite that, it is still a focal point for commercial and social life in Athens, especially for the various immigrant communities.