Panathinaikos Football Club (Greek: Παναθηναϊκός) is a Greek professional football club based in Athens. Founded in 1908, they play in the Super League Greece and are one of the oldest and most successful clubs in Greek football history. They have won 20 Greek Championships and 17 Greek Cups.
Panathinaikos is the most successful Greek club in terms of achievements in European competitions. They have reached the European Cup (later changed to UEFA Champions League) final in 1971 and the semi-finals in 1985 and 1996.
Panathinaikos F.C. is the football department of Panathinaikos Athlitikos Omilos (PAO), a multi-sport club. In 1979, the department became professional and independent. They have played their home games in a number of grounds, most significantly the Apostolos Nikolaidis Stadium – which is considered as their traditional home ground – and the Athens Olympic Stadium.
The club holds a long-standing rivalry with Olympiacos and matches between the two teams are referred to as "Derby of the eternal enemies".
Panathinaikos F.C. is one of only two supporter-owned football clubs in Greece, along with Aris Thessaloniki F.C.