| Ko Jae-Sung | |
| Fullname: | Ko Jae-Sung |
| Birth Date: | 28 January 1985 |
| Birth Place: | South Korea |
| Position: | Midfielder |
| Currentclub: | Semen Padang |
| Clubnumber: | 17 |
| Youthclubs1: | Daegu University |
| Years1: | 2008 |
| Clubs1: | Suwon City |
| Caps1: | 24 |
| Goals1: | 2 |
| Years2: | 2009–2010 |
| Clubs2: | Seongnam Ilhwa Chunma |
| Caps2: | 35 |
| Goals2: | 0 |
| Years3: | 2011 |
| Clubs3: | Nanchang Hengyuan |
| Caps3: | 28 |
| Goals3: | 3 |
| Years4: | 2012–2015 |
| Clubs4: | Gyeongnam FC |
| Caps4: | 54 |
| Goals4: | 5 |
| Years5: | 2013–2014 |
| Clubs5: | → Sangju Sangmu (army) |
| Caps5: | 40 |
| Goals5: | 3 |
| Years6: | 2016 |
| Clubs6: | Busan IPark |
| Caps6: | 16 |
| Goals6: | 0 |
| Years7: | 2017 |
| Clubs7: | Semen Padang FC |
| Caps7: | 15 |
| Goals7: | 1 |
| Pcupdate: | 19 February 2016 |
| Hangul: | 고재성 |
| Hanja: | 高在成 |
| Rr: | Go Jae-seong |
| Mr: | Ko Chae-sŏng |
Ko Jae-Sung (; born 28 January 1985) is a South Korean footballer, who currently plays as defensive-midfielder for Semen Padang FC.
On 22 February 2011, Ko signed for Chinese club Nanchang Hengyuan in the Chinese Super League on a one-year deal.[1]
| Club performance | League | Cup | League Cup | Other | Total | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Season | Club | League | Apps | Goals | Apps | Goals | Apps | Goals | Apps | Goals | Apps | Goals | |
| South Korea | League | KFA Cup | League Cup | Asia | Total | ||||||||
| 2008 | Suwon City | Korea National League | 12 | 1 | 1 | 0 | colspan="2" | - | colspan="2" | - | 13 | 1 | |
| 2009 | Seongnam Ilhwa | K-League | 19 | 0 | 3 | 0 | 6 | 1 | colspan="2" | - | 28 | 1 | |
| 2010 | 16 | 0 | 2 | 0 | 1 | 0 | 11 | 0 | 30 | 0 | |||
| China PR | League | FA Cup | CSL Cup | Asia | Total | ||||||||
| 2011 | Nanchang Hengyuan | Chinese Super League | 28 | 3 | 0 | 0 | 0 | 0 | colspan="2" | - | 28 | 3 | |
| South Korea | League | KFA Cup | League Cup | Play-offs | Total | ||||||||
| 2012 | Gyeongnam FC | K-League | 31 | 2 | 2 | 0 | 0 | 0 | - | - | 33 | 2 | |
| 2013 | Sangju Sangmu | K League Challenge | 28 | 3 | 1 | 0 | 0 | 0 | 1 | 0 | 30 | 3 | |
| 2014 | K League Classic | 12 | 0 | 1 | 0 | 0 | 0 | 0 | 13 | 0 | |||
| 2014 | Gyeongnam FC | K League Classic | 12 | 1 | 0 | 0 | 0 | 0 | 2 | 0 | 14 | 1 | |
| 2015 | K League Challenge | 11 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 11 | 2 | ||
| 2016 | Busan IPark | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | ||
| Indonesia | League | Piala Indonesia | Liga 1 | Tournament | Total | ||||||||
| 2017 | Semen Padang FC | Liga 1 | 15 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 15 | 1 | |
| Career total | 184 | 13 | 12 | 0 | 7 | 1 | 16 | 0 | 219 | 14 | |||