Panathinaikos Athlitikos Omilos, also known simply as Panathinaikós, is a major Greek multi-sport club based in the City of Athens. Panathinaikos is one of the most successful multi-sport clubs and one of the oldest clubs in Greece. The name "Panathinaikos" was inspired by the ancient work of Isocrates Panathenaicus, where the orator praise the Athenians for their democratic education and their military superiority, which use it for benefit of all Greeks.

Panathinaikos Football Club, known as Panathinaikos, or by its full name, and the name of its parent sports club, Panathinaikos A.O. or PAO, is a Greek professional football club based in Athens, Greece.