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.
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. There are 131 hotels located near the square. 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, and is decorated with busts ot famous Athenians such as Pericles and Solon.
In the middle of Kotzia square classical antiquities have been recently uncovered that include a large part of an ancient road, tombs and a small building. The square is situated just outside of the ancient Acharnian Gate of Classical Athens.