12. Round | 07/10/2023 | Colchester United | - | Morecambe FC | 1:3 | ||||
14. Round | 21/10/2023 | Colchester United | - | Harrogate Town | 1:2 | ||||
15. Round | 24/10/2023 | Grimsby Town | - | Colchester United | 2:3 | ||||
17. Round | 11/11/2023 | Colchester United | - | Sutton United | 1:1 | ||||
18. Round | 18/11/2023 | Stockport County | - | Colchester United | 2:0 | ||||
20. Round | 28/11/2023 | Doncaster Rovers | - | Colchester United | 3:1 | ||||
21. Round | 09/12/2023 | Colchester United | - | Crawley Town | 1:2 | ||||
23. Round | 22/12/2023 | Colchester United | - | Salford City | 2:1 | ||||
24. Round | 26/12/2023 | Milton Keynes Dons | - | Colchester United | 1:0 | ||||
26. Round | 01/01/2024 | Colchester United | - | Gillingham FC | 0:1 |