| Kim Sung-il 김성일 | |
| Fullname: | Kim Sung-il |
| Birth Date: | 13 April 1973 |
| Birth Place: | South Korea |
| Position: | defender |
| Youthyears1: | 1992–1995 |
| Youthclubs1: | Yonsei University |
| Years1: | 1996–1997 |
| Years2: | 1998–2003 |
| Years3: | 2004–2005 |
| Clubs1: | Sangmu (military service) |
| Clubs3: | Seongnam Ilhwa Chunma |
| Caps2: | 104 |
| Goals2: | 16 |
| Caps3: | 16 |
| Goals3: | 0 |
| Nationalyears1: | 2015– |
| Nationalteam1: | Incheon United (coach) |
| Hangul: | 김성일 |
| Rr: | Kim Sung-il |
| Mr: | Kim Sŏngil |
Kim Sung-il (; born April 13, 1973 South Korea) is a South Korean former footballer who played as a defender.
He started professional career at FC Seoul, then known as Anyang LG Cheetahs in 1998.
Kim Sung-il was appointed as coach of Incheon United in 2015[1]