| 1. Round | 22/07/2012 | NK Zadar | - | NK Osijek | 0:0 | ||||
| 2. Round | 29/07/2012 | NK Osijek | - | NK Zagreb | 1:0 | ||||
| 3. Round | 03/08/2012 | Lokomotiva Zagreb | - | NK Osijek | 0:0 |  |
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| 4. Round | 10/08/2012 | NK Inter Zaprešić | - | NK Osijek | 0:3 | ||||
| 5. Round | 18/08/2012 | NK Osijek | - | HNK Rijeka | 1:1 | ||||
| 6. Round | 26/08/2012 | Hajduk Split | - | NK Osijek | 1:1 | ||||
| 7. Round | 02/09/2012 | NK Osijek | - | Slaven Belupo | 1:2 | ||||
| 8. Round | 14/09/2012 | Dinamo Zagreb | - | NK Osijek | 0:0 | ||||
| 9. Round | 22/09/2012 | NK Osijek | - | HNK Cibalia | 1:0 | ||||
| 10. Round | 29/09/2012 | NK Istra 1961 | - | NK Osijek | 1:3 | ||||
| 11. Round | 06/10/2012 | NK Osijek | - | RNK Split | 2:2 | ||||
| 12. Round | 20/10/2012 | NK Osijek | - | NK Zadar | 2:0 | ||||
| 13. Round | 26/10/2012 | NK Zagreb | - | NK Osijek | 2:1 | ||||
| 14. Round | 04/11/2012 | NK Osijek | - | Lokomotiva Zagreb | 1:2 | ||||
| 15. Round | 10/11/2012 | NK Osijek | - | NK Inter Zaprešić | 1:1 | ||||
| 16. Round | 18/11/2012 | HNK Rijeka | - | NK Osijek | 3:1 | ||||
| 17. Round | 24/11/2012 | NK Osijek | - | Hajduk Split | 0:0 | ||||
| 18. Round | 01/12/2012 | Slaven Belupo | - | NK Osijek | 2:0 |
Croatia