| 3. Round | 04/09/1920 | Chelsea FC | - | Derby County | 1:1 | ||||
| 4. Round | 06/09/1920 | Tottenham Hotspur | - | Derby County | 2:0 | ||||
| 11. Round | 23/10/1920 | Derby County | - | Arsenal FC | 1:1 | ||||
| 12. Round | 30/10/1920 | Arsenal FC | - | Derby County | 2:0 | ||||
| 13. Round | 06/11/1920 | Derby County | - | Bolton Wanderers | 0:0 | ||||
| 14. Round | 13/11/1920 | Bolton Wanderers | - | Derby County | 1:0 | ||||
| 15. Round | 20/11/1920 | Middlesbrough FC | - | Derby County | 1:0 | ||||
| 18. Round | 11/12/1920 | Derby County | - | Blackburn Rovers | 0:1 | ||||
| 19. Round | 18/12/1920 | Huddersfield Town | - | Derby County | 2:0 | ||||
| 20. Round | 25/12/1920 | Bradford City | - | Derby County | 2:2 | ||||
| 21. Round | 27/12/1920 | Derby County | - | Bradford City | 1:1 | ||||
| 22. Round | 01/01/1921 | Derby County | - | Huddersfield Town | 2:1 | ||||
| 23. Round | 15/01/1921 | Preston North End | - | Derby County | 2:1 | ||||
| 24. Round | 22/01/1921 | Derby County | - | Preston North End | 1:1 | ||||
| 26. Round | 05/02/1921 | Derby County | - | Oldham Athletic | 3:3 | ||||
| 27. Round | 12/02/1921 | Burnley FC | - | Derby County | 2:1 |
Scotland