| Kim Jin-sung | |
| Birth Date: | 9 December 1999 |
| Birth Place: | Gimpo, South Korea[1] |
| Height: | 1.75 m |
| Position: | Attacking midfielder |
| Youthclubs1: | Kwangwoon University |
| Youthyears1: | 2018–2019 |
| Years1: | 2020–2023 |
| Clubs1: | FC Seoul |
| Caps1: | 9 |
| Goals1: | 1 |
| Years2: | 2022 |
| Clubs2: | → Cheonan City (loan) |
| Caps2: | 2 |
| Goals2: | 0 |
| Years3: | 2023 |
| Clubs3: | → PSMS Medan (loan) |
| Caps3: | 6 |
| Goals3: | 1 |
| Club-Update: | 7 April 2024 |
| Hangul: | 김진성 |
| Hanja: | 金眞成 |
| Rr: | Gim Jinseong |
| Mr: | Kim Chinsŏng |
Kim Jin-sung (; born 9 December 1999) is a South Korean footballer who plays as an attacking midfielder.
Kim Jin-sung joined FC Seoul in 2020. He made his K League 1 debut on 3 April 2021 against Gangwon FC.[2]
On 13 July 2022, he was loaned to Cheonan City of K3 League.[3]