| 3. Round | 18/03/2012 | Daegu FC | - | Incheon United | 1:0 | ||||
| 4. Round | 24/03/2012 | Incheon United | - | Daejeon Citizen | 2:1 | ||||
| 5. Round | 01/04/2012 | Incheon United | - | Gyeongnam FC | 0:0 | ||||
| 8. Round | 15/04/2012 | Sangju Sangmu | - | Incheon United | 1:0 | ||||
| 9. Round | 22/04/2012 | Incheon United | - | Ulsan Hyundai FC | 0:1 | ||||
| 10. Round | 29/04/2012 | Chunnam Dragons | - | Incheon United | 0:0 | ||||
| 11. Round | 05/05/2012 | Incheon United | - | Jeonbuk FC | 3:3 |  |
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| 12. Round | 11/05/2012 | Seongnam Ilhwa Chunma | - | Incheon United | 1:0 | ||||
| 13. Round | 19/05/2012 | Incheon United | - | Busan IPark | 0:0 | ||||
| 14. Round | 28/05/2012 | FC Seoul | - | Incheon United | 3:1 | ||||
| 15. Round | 14/06/2012 | Incheon United | - | Pohang Steelers | 1:1 | ||||
| 16. Round | 17/06/2012 | Gwangju FC | - | Incheon United | 0:0 | ||||
| 24. Round | 29/07/2012 | Suwon Bluewings | - | Incheon United | 3:1 | ||||
| 25. Round | 04/08/2012 | Incheon United | - | Chunnam Dragons | 1:0 | ||||
| 26. Round | 09/08/2012 | Daejeon Citizen | - | Incheon United | 0:2 | |
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| 27. Round | 12/08/2012 | Incheon United | - | Gangwon FC | 2:0 | |
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| 29. Round | 23/08/2012 | Jeonbuk FC | - | Incheon United | 1:2 | ||||
| 30. Round | 26/08/2012 | Incheon United | - | Jeju United | 0:0 |
South Korea