Greek C Basket League
The Greek C Basket League, or Greek C Basketball League () is the national professional 4th-tier of the basketball league system in Greece. It is also known as the Third National Championship, C National Championship, Third National League, C National League, and Fourth Division, or in Greek, Γάμμα Εθνική καλαθοσφαίρισης (Gamma Ethniki Basketball).

It began in the 1985–86 season, and originally took place in two groups. Today, it takes place in four groups, each of them with 14 teams, so that overall, 56 teams take part in the league. In the last season (2014–15), the champions were the clubs Esperos Patras, Kronos Agiou Dimitriou, AEL 1964, and Polygiros

Champions

Current clubs
The clubs taking part in the 2017–18 league are: