Draw
20251/64-finals
| 1 | Gangwon | Bye | |
| 5 | Siheung Citizen | Bye | |
| 6 | Bye | Seongnam | |
| 7 | Hwaseong | Bye | |
| 8 | Jinju Citizen | Yeoncheon | 1 : 0 |
| 9 | Dangjin Citizen | Gangneung | 1 : 2 |
| 10 | Bye | Asan | |
| 12 | Bye | Daejeon | |
| 13 | Jeonbuk | Bye | |
| 15 | Ansan Greeners | Bye | |
| 16 | Jeonbuk Jeonju | Pyeongtaek Citizen | 0 : 6 |
| 17 | Hyochang | Gijang United | 0 : 4 |
| 18 | Bye | Gimpo FC | |
| 19 | Cheonan City | Bye | |
| 20 | Cheongsol | Pocheon | 0 : 5 |
| 24 | Bye | Pohang | |
| 25 | Sejong SA | Ulsan Citizen | 3 : 0 |
| 26 | Bye | Jeonnam | |
| 28 | Bye | Anyang | |
| 29 | Daegu | Bye | |
| 31 | Gimhae | Bye | |
| 32 | Yangcheon TNT | Geoje | 0 : 1 |
| 33 | Incheon Seogot | Daejeon Korail | 0 : 9 |
| 34 | Bye | Cheongju | |
| 35 | Changwon | Bye | |
| 36 | Geonyung | Namyangju | 1 : 5 |
| 40 | Bye | Seoul | |
| 41 | Yangsan Eogok | Busan Kyotong | 1 : 2 |
| 42 | Bye | Busan | |
| 44 | Bye | Suwon FC | |
| 45 | Gwangju FC | Bye | |
| 47 | Gyeongju KHNP | Bye | |
| 48 | Seoul Jungnang | Paju Citizen | 0 : 3 |
| 49 | Ulsan HD | Bye | |
| 53 | Gimhae Jaemics | Chuncheon | 2 : 4 |
| 54 | Bye | Incheon | |
| 55 | Gyeongnam | Bye | |
| 56 | Pyeongchang United | Yangpyeong | 2 : 1 |
| 57 | Yeoju Citizen | Mokpo | 4 : 3 |
| 58 | Bye | Bucheon FC 1995 | |
| 60 | Bye | Jeju SK | |
| 61 | Gimcheon Sangmu | Bye | |
| 63 | Suwon Bluewings | Bye | |
| 64 | Bye | Seoul E-Land |
1/32-finals
| 1 | Gangwon | Bye | |
| 3 | Siheung Citizen | Seongnam | 3 : 2 |
| 4 | Hwaseong | Jinju Citizen | 1 : 0 |
| 5 | Gangneung | Asan | 1 : 0 |
| 6 | Bye | Daejeon | |
| 7 | Jeonbuk | Bye | |
| 8 | Ansan Greeners | Pyeongtaek Citizen | 3 : 1 |
| 9 | Gijang United | Gimpo FC | 0 : 4 |
| 10 | Cheonan City | Pocheon | 1 : 0 |
| 12 | Bye | Pohang | |
| 13 | Sejong SA | Jeonnam | 3 : 1 |
| 14 | Bye | Anyang | |
| 15 | Daegu | Bye | |
| 16 | Gimhae | Geoje | 5 : 1 |
| 17 | Daejeon Korail | Cheongju | 1 : 0 |
| 18 | Changwon | Namyangju | 1 : 2 |
| 20 | Bye | Seoul | |
| 21 | Busan Kyotong | Busan | 2 : 1 |
| 22 | Bye | Suwon FC | |
| 23 | Gwangju FC | Bye | |
| 24 | Gyeongju KHNP | Paju Citizen | 4 : 1 |
| 25 | Ulsan HD | Bye | |
| 27 | Chuncheon | Incheon | 0 : 3 |
| 28 | Gyeongnam | Pyeongchang United | 0 : 3 |
| 29 | Yeoju Citizen | Bucheon FC 1995 | 1 : 3 |
| 30 | Bye | Jeju SK | |
| 31 | Gimcheon Sangmu | Bye | |
| 32 | Suwon Bluewings | Seoul E-Land | 2 : 1 |
1/16-finals
| 1 | Gangwon | Bye | |
| 2 | Siheung Citizen | Hwaseong | 1 : 0 |
| 3 | Gangneung | Daejeon | 1 : 2 |
| 4 | Jeonbuk | Ansan Greeners | 3 : 0 |
| 5 | Gimpo FC | Cheonan City | 2 : 1 |
| 6 | Bye | Pohang | |
| 7 | Sejong SA | Anyang | 0 : 1 |
| 8 | Daegu | Gimhae | 2 : 0 |
| 9 | Daejeon Korail | Namyangju | 3 : 0 |
| 10 | Bye | Seoul | |
| 11 | Busan Kyotong | Suwon FC | 1 : 2 |
| 12 | Gwangju FC | Gyeongju KHNP | 2 : 0 |
| 13 | Ulsan HD | Bye | |
| 14 | Incheon | Pyeongchang United | 2 : 1 |
| 15 | Bucheon FC 1995 | Jeju SK | 1 : 0 |
| 16 | Gimcheon Sangmu | Suwon Bluewings | 2 : 0 |
1/8-finals
| 1 | Gangwon | Siheung Citizen | |
| 2 | Daejeon | Jeonbuk | |
| 3 | Gimpo FC | Pohang | |
| 4 | Anyang | Daegu | |
| 5 | Daejeon Korail | Seoul | |
| 6 | Suwon FC | Gwangju FC | |
| 7 | Ulsan HD | Incheon | |
| 8 | Bucheon FC 1995 | Gimcheon Sangmu |
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