Kim Ju-sung (; born 12 December 2000) is a South Korean footballer who plays as a left-footed centre-back for J1 League club Sanfrecce Hiroshima and the South Korea national team.
Kim Ju-sung joined FC Seoul in 2019. He made his K League 1 debut on 13 July 2019.
Kim Ju-sung was selected to play for the South Korea under-20 team at the 2019 FIFA U-20 World Cup.
Kim Ju-sung was part of the South Korea squad at the 2022 EAFF E-1 Football Championship.
Gimcheon Sangmu
South Korea U20