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Greek basketball league system
Country	Greece
Sport	Basketball
Promotion and relegation	Yes
National system
Federation	Hellenic Basketball Association (HEBA) ; & ; Hellenic Basketball Federation (HBF)
Confederation	FIBA Europe
Top division	Greek Basket League
Second division	A2 Basketball League
Cup competition	Greek Cup; Greek Super Cup; Greek Second Division Cup; ;
	Basketball in Greece

The Greek basketball league system is a number of interconnected competitions for professional basketball clubs in Greece. The system has a hierarchical format with a promotion and relegation system between competitions at different levels. There are nine different competition levels in the system. The highest level competitions are the professional and semi professional nationwide competitions, which include the top-tier level Greek Basketball League (GBL), the second-tier level Greek A2 Basketball League, the third-tier level Greek B Basketball League, and the fourth-tier level Greek C Basketball League. Those competitions are then followed by the regional amateur level competitions, which include: the A1, the A2, the B, the C, and/or the C1, and the C2 categories.

The top-tier level Greek Basketball League is organized by the Hellenic Basketball Association (HEBA), while all of the league levels below the top-tier are organized by the Hellenic Basketball Federation (HBF).

Competitions

League
Professional Level
HEBA Greek Basketball League (A1) National 1st Division (All clubs must be legally licensed, registered, and recognized as fully professional clubs.) (12 teams)
HBF Greek A2 Basketball League (A2) National 2nd Division (Clubs don't have to be legally licensed as professional entities. Some are and some are not.) (16 teams)
HBF Greek National League 1 (B) National 3rd Division (36 teams) (2nd-tier from 1961 to 1986)^{[citation needed]}
Semi Professional Level
HBF Greek National League 2 (C) National 4th Division (60 teams)
HBF Amateur Level
ESKAH, ESKAK, EKASKENOP, EKASK, ESKASE, T.E. Chiou, T.E. Lesvou, T.E. Samou, T.E. Dodekanisou, E.S.K. Kikladon, ESKA, ESKANA, ESKABDE, ESKATH, EKASKEM, EKASDYM, EKASAMATH, EKASX A1 Category Regional 1st Division
ESKAH, ESKAK, EKASKENOP, EKASK, ESKASE, T.E. Chiou, T.E. Lesvou, T.E. Samou, T.E. Dodekanisou, E.S.K. Kikladon, ESKA, ESKANA, ESKABDE, ESKATH, EKASKEM, EKASDYM, EKASAMATH, EKASX A2 Category Regional 2nd Division
ESKAH, ESKAK, EKASKENOP, EKASK, ESKASE, T.E. Chiou, T.E. Lesvou, T.E. Samou, T.E. Dodekanisou, E.S.K. Kikladon, ESKA, ESKANA, ESKABDE, ESKATH, EKASKEM, EKASDYM, EKASAMATH, EKASX B Category Regional 3rd Division
ESKAH, ESKAK, EKASKENOP, EKASK, ESKASE, T.E. Chiou, T.E. Lesvou, T.E. Samou, T.E. Dodekanisou, E.S.K. Kikladon, ESKA, ESKANA, ESKABDE, ESKATH, EKASKEM, EKASDYM, EKASAMATH, EKASX C or C1 Category Regional 4th Division
ESKAH^[1] C2 Category Regional 5th Division