Lee in Seoul Plaza, South Korea in 2018
|Date of birth||6 January 1998|
|Place of birth||Suwon, South Korea|
|Height||1.70 m (5 ft 7 in)|
|Playing position||Winger / Attacking midfielder|
|2013–2015||South Korea U17||18||(13)|
|2015–2017||South Korea U20||16||(7)|
|2018–||South Korea U23||6||(4)|
* Senior club appearances and goals counted for the domestic league only and correct as of 11 May 2019|
‡ National team caps and goals correct as of 11 June 2019
|Revised Romanization||I Seungu|
Lee made his international debut as a part of South Korea's U-16 team competing for the 2014 AFC U-16 Championship qualification, where he scored a hat-trick in 34 minutes against the team from Laos. He also scored a fourth goal later in the match.
In April 2014, Lee was a part of the South Korea U-16 team that was the runner-up at the Montaigu Tournament. Lee was named to the Team of the Tournament. In September, he led South Korea to another runner-up finish, this time at the 2014 AFC U-16 Championship. His best performance came against Japan during the semifinals; he netted a brace for the Korean Republic national football team, also known as the Taegeuk Warriors, with one goal driven directly to the net from the side of his team. He scored 5 goals and assisted four others in 5 total matches, earning the title as tournament MVP. This performance helped South Korea land a berth in the 2015 FIFA U-17 World Cup.
In 2015, Lee was the youngest member of South Korea's U-18 team that participated in the Suwon JS Cup.
At the 2015 FIFA U-17 World Cup, Lee was a stand-out performer, where he helped South Korea to win the match against Brazil. However, South Korea eventually lost against Belgium in the Round of 16. He shortly returned to South Korea afterwards to train with the second division side Suwon FC until January 2016, when he turned 18 and became able to participate in official matches for FC Barcelona again.
Lee was called for senior national side for the first time before 2018 FIFA World Cup when in May 2018 he was named in South Korea's preliminary 28 man squad. Lee Seung-woo has played a big part in South Korea's 2–0 victory over Honduras in Daegu Stadium on 28 May 2018. He played a short pass, a bold dribble, and witty play in midfield. Lee also assisted Son Heung-min's starting goal.
Lee was also named in the 2018 Asian Games in Jakarta-Palembang, Indonesia led by coach Kim Hak-bum. At 23 August, when Korea was playing against Iran, Lee Seung-woo scored the first goal of the Asian Games, leading to the victory of the team by 2:0. At the semi-final against Vietnam, Lee scored the final goal and led the team to the final by 3:1. At the final against Japan, Lee started the game as a sub. During the second half, Lee switched with Kim Jung-min, but both teams could not score in the first 90 minutes. At overtime, Lee received Son Heung-min's pass and scored a goal. Lee and his teammates won the gold medal in the Asian Games.
- As of 11 May 2019 
|Barcelona B||2015–16||Segunda División B||1||0||—||—||—||1||0|
|Hellas Verona||2017–18||Serie A||14||1||2||0||—||—||16||1|
South Korea U23
- AFC U-16 Championship Top scorer: 2014
- AFC U-16 Championship Most Valuable Player: 2014
- Asian Young Footballer of the Year: 2017
- KFA Goal of the Year: 2017 (vs. Argentina U20)
- "2018 FIFA World Cup Russia – List of Players" (PDF). FIFA.com. Fédération Internationale de Football Association. 4 June 2018. Retrieved 19 June 2018.
- Price, Steve The South Korean Prodigies Held Back by Barcelona's Transfer Ban These Football Times. 26 January 2016
- "#BenvenutoLee". hellasverona.it. 31 August 2017. Retrieved 31 August 2017.
- "Barcelona sell Lee Seung-Woo to Hellas Verona for €1.5m". espnfc.com. 31 August 2017. Retrieved 31 August 2017.
- http://www.hellas1903.it/news/pagelle-verona-bearzotti-e-lee-sono-gli-unici-che-non-vanno-a-fondo/ hellas1903
- "Lee Seung-Woo debut goal, but Helles Verona is relegated". MK sports.
- JIMÉNEZ, RUBÉN (2 March 2015). "Seung-Woo Lee, Asia's Messi". Marca.com. Retrieved 10 May 2015.
- "Revealed: Every World Cup 2018 squad – 23-man & preliminary lists & when will they be announced?". Goal. Retrieved 18 May 2018.
- 이, 종현 (30 May 2018). "Lee Seung-woo, the possibility of 23 finalists in the World Cup ... Very active debut". SPOTV NEWS. Retrieved 1 June 2018.
- "Korea beats Iran to move into last eight". koreatimes. 24 August 2018. Retrieved 3 September 2018.
- Post, The Jakarta. "Asian Games: Extra time goals allow South Korea to win soccer gold". The Jakarta Post. Retrieved 3 September 2018.
- Lee Seung-woo at Soccerway
- "Lee scoops MVP, top scorer awards". The AFC.com. 21 September 2014.
- "Khrbin and Kerr land AFC Awards". The AFC.com. 29 November 2017.
- "이승우, 올해의 베스트골 수상" (in Korean). Yonhap. 19 December 2017.