Panionios B.C. (Greek: Πανιώνιος KAE) is the Greek professional basketball club that plays its home games in Nea Smyrni, Athens, Greece. The club is also widely known as Πανιώνιος Γυμναστικός Σύλλογος Σμύρνης, or Panionios Gymnastikos Syllogos Smyrnis, which is the Pan-Ionian Gymnastic Association of Smyrna. This is usually abbreviated to the club name of Πανιώνιος Γ.Σ.Σ. Panionios B.C. is the basketball department of the Panionios Gymnastic Club that is based in Nea Smyrni, Athens.