Panathinaikos A.O.

Active departments of Panathinaikos
Football Basketball Volleyball
Water Polo Swimming Athletics
Table Tennis Wrestling Weightlifting
Boxing Fencing Cycling
Shooting Archery Club

Panathinaikos Athlitikos Omilos (Greek spelling: Παναθηναϊκός Αθλητικός Όμιλος) is the most successful Greek multi-sport club based in Athens, Greece. It has the shamrock as its official emblem and green and white as its colours. In English, the club's name would be "Panathenian Athletic Club".

Panathinaikos' teams and individual athletes have won numerous titles and have made notable participations in international competitions such as the UEFA Champions League in football and the Euroleague in basketball. According to the official history of the club, Panathinaikos was founded by Giorgos Kalafatis in 1908, when he and 40 other athletes decided to break away from Panellinios Gymnastikos Syllogos following the club's decision to discontinue its football team.