StadiumThe Den
| Current capacity of the stadium |
| Standing | 41 500 |
| Seats | 26 000 |
| Tribune | 15 600 |
| Seats for sponsors | 500 |
| Fans attended |
| 28. 12. 2025 | Millwall F.C.-Hamstreet | 5 642 |
| 27. 12. 2025 | Millwall F.C.-Stretford End | 4 913 |
| 22. 12. 2025 | Millwall F.C.-Brighton FC | 5 018 |
| 21. 12. 2025 | Millwall F.C.-Bielefeld | 5 817 |
| 18. 12. 2025 | Millwall F.C.-FC Exeter Wardens | 3 930 |
| 15. 12. 2025 | Millwall F.C.-Norwich City FC | 3 955 |
| 14. 12. 2025 | Millwall F.C.-Káva SE | 4 269 |
| 11. 12. 2025 | Millwall F.C.-Barnet | 21 498 |
| 6. 12. 2025 | Millwall F.C.-Rougemont | 20 661 |