Panathinaikos V.C., also known simply as Panathinaikos, or with its full name Panathinaikos A.O. is the professional volleyball team of the major Athens based multi-sport club Panathinaikos A.O. Founded in 1919, it is one of the oldest and most successful volleyball clubs in Greece. They have won 20 Greek Championships finishing 6 times undefeated, 6 Greek Cups, 3 Greek League Cups and 2 Greek Super Cups. They have reached also twice the CEV Cup final.

The A1 Ethniki, often referred to as the Greek Volleyball League, is the highest professional volleyball league in Greece. It is run by the Hellenic Volleyball Federation. It is considered one of the top national leagues in European volleyball, as its clubs have made significant success in European competitions.