Park Seong-hoon (; born January 27, 2003) is a South Korean professional footballer who plays as a central defender for K League 1 club FC Seoul. He trained in the club's youth system, serving as captain for its U-18 youth team. He made his debut appearance in the 2022 K League 1 season. After limited appearances in his first two seasons, Park became a regular starter in 2024, scoring his first league goal.
Park Seong-hoon was born on January 27, 2003. He enrolled at Osan Middle School and played for the FC Seoul U-15 Team. He continued his education at Osan High School, playing for the FC Seoul U-18 Team and serving as captain of the squad.
In 2022, Park signed a professional contract with K League 1 club FC Seoul. He received few opportunities to play with the squad, making a single appearance in each of his first two seasons with the team; he was characterized as a "backup centre-back" at the time.
Beginning in 2024, Park's playing time increased due to the absence of defender Kim Ju-sung, who had sustained an injury earlier in the season, and Rebin Sulaka's departure from the team. In June, Park scored his debut goal, contributing to FC Seoul's 3âÂÂ0 victory against Suwon FC. Writing for football magazine FourFourTwo, Oh Jong-hyeon designated him as the standout player of the match for his performance in both offense and defense. Park was declared the Man of the Match by the K League, rating his performance 8.3 points out of ten. He appeared in the starting lineup in eleven of his twelve appearances in the season.
Following Kim's return in the 2025 season and being pattered with Yazan Al-Arab, Park was principally been used a substitute. He scored his second league goal during a match in July against Jeju SK FC.
In 2018, Park was called up to the South Korea national under-17 football team. As of 2025, he is a member of the under-23 team.
Park plays as a central defender. He has been noted for his "remarkable" positional awareness and ability to handle the ball.