TheBelgian Third Division A was one of the two leagues at thethird level of theBelgian football league system, the other one being theBelgian Third Division B. This division existed from the 1952–53 to 2015–16 seasons and was played every year with 18 clubs from 2009. Prior to this, the third level in theBelgian football league system was called Promotion and was divided into four leagues of 16 clubs each and prior to the 1931–32 season, the Promotion was divided into three leagues. Due to restructuring, the Third Division was replaced byBelgian Second Amateur Division which plays as three leagues of 16 clubs each from the 2016–17 season.
^ — R. ES Acrenoise won theBelgian Promotion play-off; admitted to replace defunctR.A.E.C. Mons
^ — SK Sint-Niklaas promoted via theBelgian Promotion play-off
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