Omonoia Square (Greek: Πλατεία Ομονοίας, Plateía Omonoías, pronounced [plaˈtia omoˈnias], "Concord Square", often simply referred to as Omónia [oˈmonia]) is a central square in Athens. It marks the northern corner of the downtown area defined by the city plans of the 19th century, and is one of the city's principal traffic hubs. It is served by Omonoia train station.
Omonoia Square is one of the oldest squares in the city of Athens and an important shopping centre. It is located at the center of the city at the intersection of six main streets: Panepistimiou, Stadiou Athinas, Peiraios, Agiou Konstadinou and 3rd Septemvriou.
Sporting celebrations have recently been held here, including following Greece's victory in the Eurobasket 2005 finals and in winning the championship. Other sporting successes, such as the Euro 2004 tournament, when people climbed the 'Five-ring' sculpture to celebrate with national flags, have also tended to be celebrated here.