Seol Young-woo is a South Korean full-back born in Ulsan on 5 December 1998. He came through Ulsan Hyundai's youth setup, attended the University of Ulsan, and joined the senior team in 2020. With Ulsan he contributed to K League 1 titles in 2022 and 2023 before moving to Red Star Belgrade in 2024. Seol represented South Korea at youth levels, including the under-23 team, and became a senior international in 2023, playing at the 2023 AFC Asian Cup.