1. Round 07/08/1998 Samsunspor - Kocaelispor 0:1
2. Round 15/08/1998 Kocaelispor - Karabükspor 2:0
3. Round 21/08/1998 Galatasaray - Kocaelispor 3:1
4. Round 29/08/1998 Kocaelispor - Trabzonspor 1:1
5. Round 12/09/1998 Sakaryaspor - Kocaelispor 2:2 Goal
6. Round 19/09/1998 Kocaelispor - Beşiktaş 0:2
7. Round 26/09/1998 MKE Ankaragücü - Kocaelispor 0:2
10. Round 31/10/1998 Kocaelispor - Altay Izmir 2:1 Goal
11. Round 07/11/1998 Bursaspor - Kocaelispor 2:1
12. Round 12/11/1998 Kocaelispor - Dardanelspor 2:0 Goal
13. Round 20/11/1998 Kocaelispor - İstanbulspor AŞ 0:1
14. Round 27/11/1998 Erzurumspor (1968-2015) - Kocaelispor 0:0
15. Round 03/12/1998 Kocaelispor - Fenerbahçe 0:3
18. Round 29/01/1999 Kocaelispor - Samsunspor 1:0
19. Round 06/02/1999 Karabükspor - Kocaelispor 0:1
20. Round 11/02/1999 Kocaelispor - Galatasaray 1:2 Goal
21. Round 20/02/1999 Trabzonspor - Kocaelispor 0:3 Goal
22. Round 25/02/1999 Kocaelispor - Sakaryaspor 0:1
23. Round 05/03/1999 Beşiktaş - Kocaelispor 0:3 Goal
24. Round 13/03/1999 Kocaelispor - MKE Ankaragücü 0:1
25. Round 20/03/1999 Antalyaspor - Kocaelispor 2:1
26. Round 03/04/1999 Kocaelispor - Gaziantepspor 1:1
27. Round 10/04/1999 Altay Izmir - Kocaelispor 3:1
28. Round 16/04/1999 Kocaelispor - Bursaspor 4:0 Goal
29. Round 24/04/1999 Dardanelspor - Kocaelispor 3:1
30. Round 01/05/1999 İstanbulspor AŞ - Kocaelispor 2:1
31. Round 09/05/1999 Kocaelispor - Erzurumspor (1968-2015) 1:1
32. Round 14/05/1999 Fenerbahçe - Kocaelispor 1:1
33. Round 20/05/1999 Kocaelispor - Gençlerbirliği 2:0