2020–21 Belgian First Division B
The 2020–21 season of the Belgian First Division B is scheduled to begin in August 2020 and end in April 2021.
Team changes
In
- Waasland-Beveren were relegated from the 2019–20 Belgian First Division A.
- Deinze were promoted from the 2019–20 Belgian First Amateur Division as champions.
- RFC Seraing and RWD Molenbeek filled in the open spots left by the extra relegations of Roeselare and Virton, as highest finishing teams which had obtained a professional footballing license.
Out
- 1 promotion spot still up for grabs.
- Lokeren went bankrupt and folded. Temse moved to Lokeren and renamed themselves KSC Lokeren-Temse playing in the Belgian Second Amateur Division.
- Both Roeselare and Virton were denied a professional license and forced to relegate to the Belgian First Amateur Division.
Format changes
Team information
Stadiums and locations
| Matricule | Club | City | First season of current spell at second level | Coming from | 2019-20 result | Stadium | Capacity |
| 818 | Deinze | 2020–21 | Belgian First Amateur Division | 1st | Burgemeester Van de Wiele Stadion | 7,515 | |
| 2554 | Lommel | 2018–19 | Belgian First Amateur Division | 6th | Soevereinstadion | 8,000 | |
| 5479 | Molenbeek | 2020–21 | Belgian First Amateur Division | 6th | Edmond Machtens Stadium | 12,266 | |
| 167 | Seraing | 2020–21 | Belgian First Amateur Division | 4th | Stade du Pairay | 14,234 | |
| 10 | Saint-Gilles, Brussels | 2015–16 | Belgian Third Division | 4th | Stade Joseph Marien | 5,500 | |
| 4068 | Beveren | 2020–21 | Belgian First Division A | 16th | Freethiel Stadion | 8,190 |
Personnel and kits
Managerial changes
| Team | Outgoing manager | Manner of departure | Date of vacancy | Position | Replaced by | Date of appointment |
| Union SG |  Thomas Christiansen | Contract not prolonged | End of 2019–20 season | Pre-season |  Felice Mazzù | 24 May 2020 |
| Lommel | Peter Maes | Contract not prolonged | End of 2019–20 season | Pre-season |  Liam Manning | 10 July 2020 |
| Waasland-Beveren | Dirk Geeraerd | Caretaker replaced | End of 2019–20 season | Pre-season | Nicky Hayen | 4 June 2020 |
| RWD Molenbeek | Frédéric Stilmant | Caretaker replaced | End of 2019–20 season | Pre-season | Laurent Demol | 11 June 2020 |