Greek basketball clubs in European and worldwide competitions is the performance record of men's professional basketball clubs from Greece's top-tier level league, the Greek Basket League, in international competitions.
In the following decades, Greek teams have dominated in European-wide professional club basketball, winning many trophies in continental competitions.
AEK, Aris, Iraklis Thessaloniki, Maroussi, Olympiacos, Panathinaikos, Panellinios, Panionios and PAOK have each played in all of the main top three different level tiers.
Makedonikos has only played in competitions of the second tier level, and YMCA Thessaloniki, Sporting, Near East, Ionikos Nikaias, Papagou, Irakleio, Olympia Larissa, Olympias Patras and Promitheas Patras BC have only played in competitions of the third level tier.
Aris, Lavrio and Iraklis are the only clubs so far to participate at the fourth level tier FIBA Europe Cup.