Park Seung-soo (Korean: 박승수; born 17 March 2007) is a South Korean footballer who plays as a winger for Newcastle United U21.

Park joined the youth academy of South Korean side Suwon Samsung Bluewings and was promoted to the club's senior team ahead of the 2024 season. While playing for Suwon at the K League 2, he scored his first professional goal in a 1–1 home draw with Ansan Greeners on 30 June 2024 and became the youngest player to score in South Korean professional football.

Following his stint at Suwon, on 24 July 2025, he signed for the academy of Premier League club Newcastle United. He made a total of three unofficial appearances at the senior team against K League All-Stars, Tottenham Hotspur and Espanyol during the pre-season. On 16 August, he was officially included in the senior squad for the first time in their Premier League opener against Aston Villa.

Park is a South Korea youth international. During February 2025, he played for the South Korea national under-20 team at the 2025 AFC U-20 Asian Cup.

Park is a right-footed player and plays as a left winger. He was noted for his pace and dribbling skills in his peer group.