[1][2][3] The third division was established in 1926 with three leagues of 14 clubs each as the Promotion.
A play-off was introduced in 1993 in order to determine a third team to qualify for the second division.
[1] — The result of the final game is unknown (the team shown under champion is the winner of the third division A and the team shown under runner-up is the winner of the third division B).
[2] — No final game was played (the team shown under champion is the winner of the third division A and the team shown under runner-up is the winner of the third division B).
[5] — Following the merger between Standard Liège and RFC Sérésien (both playing in the first division), RU Saint-Gilloise (2nd in the third division A and play-off finalist) also promoted.