| Kim Seong-jae | |
| Fullname: | Kim Seong-jae (김성재) |
| Birth Date: | 17 September 1976 |
| Birth Place: | South Korea |
| Youthyears1: | 1995–1998 |
| Years1: | 1999–2005 |
| Years2: | 2006 |
| Years3: | 2007–2009 |
| Clubs1: | Anyang LG Cheetahs / FC Seoul |
| Clubs3: | Chunnam Dragons |
| Caps1: | 157 |
| Caps2: | 14 |
| Caps3: | 38 |
| Goals1: | 11 |
| Goals2: | 0 |
| Goals3: | 0 |
| Nationalyears1: | 1996 |
| Nationalteam1: | South Korea U23 |
| Manageryears1: | 2016 |
| Managerclubs1: | FC Seoul (caretaker manager) |
| Manageryears2: | 2020 |
| Managerclubs2: | Yangju Citizen FC |
Kim Seong-jae (born September 17, 1976) is a South Korean retired football player and coach.
He played for FC Seoul (formerly the Anyang LG Cheetahs), Gyeongnam FC, and Chunnam Dragons.
In January 2010, he was appointed as a reserve team coach of FC Seoul.[1] In January 2010, he was appointed as an assistant manager of FC Seoul.