Kotzia Square (Greek: Πλατεία Κοτζιά) is a square in central Athens, Greece. The square retains several characteristics of 19th-century local neoclassical architecture, such as the City Hall of the Municipality of Athens and the National Bank of Greece Cultural Center. It is named after Konstantinos Kotzias, former Mayor of Athens.
The square is surrounded by the following streets: Efpolidos Street to the north, Athinas Street to the west, Kratinou to the south, and Aiolou Street from the east. The square itself is south of Omonia Square and north of Monastiraki square.
Kotzia square lies in front of the City Hall of the Municipality of Athens, (designed by Panagis Kalkos) and is decorated with busts of famous Athenians such as Pericles and Solon.