| 4. Round | 15/09/2018 | Rijnsburgse Boys | - | Kozakken Boys | 1:3 | ||||
| 7. Round | 06/10/2018 | VV Sint Bavo | - | Kozakken Boys | 3:4 | ||||
| 8. Round | 13/10/2018 | Kozakken Boys | - | HHC Hardenberg | 2:3 | ||||
| 12. Round | 17/11/2018 | Kozakken Boys | - | BVV Barendrecht | 4:0 | ||||
| 14. Round | 01/12/2018 | Kozakken Boys | - | FC Lienden | 3:0 | ||||
| 15. Round | 08/12/2018 | Kozakken Boys | - | De Treffers | 1:0 | ||||
| 17. Round | 12/01/2019 | Kozakken Boys | - | SVV Scheveningen | 2:3 | ||||
| 24. Round | 09/03/2019 | Kozakken Boys | - | IJsselmeervogels | 5:0 | ||||
| 25. Round | 16/03/2019 | Sparta Rotterdam (J) | - | Kozakken Boys | 1:2 | ||||
| 26. Round | 23/03/2019 | Kozakken Boys | - | Excelsior Maassluis | 0:2 | ||||
| 27. Round | 30/03/2019 | De Treffers | - | Kozakken Boys | 0:1 | ||||
| 28. Round | 06/04/2019 | Kozakken Boys | - | Jong Almere City FC | 3:1 | ||||
| 29. Round | 13/04/2019 | Kozakken Boys | - | SV Spakenburg | 2:1 |  |
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| 30. Round | 20/04/2019 | FC Lienden | - | Kozakken Boys | 0:2 | ||||
| 31. Round | 04/05/2019 | Kozakken Boys | - | VV Sint Bavo | 2:2 | |
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| 34. Round | 25/05/2019 | SVV Scheveningen | - | Kozakken Boys | 4:2 |
Netherlands