2019 FIFA U-20 World Cup squads
The following is a list of all the squads of the national teams that participated in the 2019 FIFA U-20 World Cup. Each team had to name a preliminary squad of between 22 and 50 players. From the preliminary squad, the team had to name a final squad of 21 players (three of whom must be goalkeepers) by the FIFA deadline. Players in the final squad could be replaced by a player from the preliminary squad due to serious injury or illness up to 24 hours prior to kickoff of the team's first  match. Players born on or after 1 January 1999 and on or before 31 December 2003 were eligible to compete in the tournament. The nationality for each club reflects the national association (not the league) to which the club is affiliated. A flag is included for coaches that are of a different nationality than their own national team. Those marked in bold have been capped at full International level. Group A. Poland. Head coach: Jacek Magiera The final squad was announced on 13 April. Colombia. Head coach: Arturo Reyes The final squad was announced on 29 April. Yéiler Góez was  replaced by Andrés Perea on 15 May due to injury. Tahiti. Head coach: Bruno Tehaamoana The final squad was announced on 28 April. Senegal. Head coach: Youssouph Dabo The final squad was announced on 13 May. Group B. Mexico. Head coach: Diego Ramírez The final squad was announced on 23 April. Italy. Head coach: Paolo Nicolato The final squad was announced on 14 April. Japan. Head coach: Masanaga Kageyama The final squad was announced on 7 May. Ecuador. Head coach: Jorge Célico The final squad was announced on 25 April. Group C. Honduras. Head coach: Carlos Tábora The final squad  was announced on 4 May. New Zealand. Head coach: Des Buckingham The final squad was announced on 16 April 2019. Uruguay. Head coach: Gustavo Ferreyra The final squad was announced on 6 May 2019. Norway. Head coach: Pål Arne Johansen The final squad was announced on 30 April 2019. Group D. Qatar. Head coach: Bruno Pinheiro Nigeria. Head coach: Paul Aigbogun The final squad was announced on 13 May 2019. Ukraine. Head coach: Oleksandr Petrakov The 25-man provisional squad was announced on 7 May 2019. Vitalii Mykolenko was replaced by Oleh Veremiyenko on 23 May due to injury. United  States. Head coach: Tab Ramos The 21-man final squad was announced on 10 May. Ayo Akinola was replaced by Julian Araujo on 22 May due to injury. Group E. Panama. Head coach: Jorge Dely Valdés The 23-man provisional squad was announced on 29 April 2019. Mali. Head coach: Mamoutou Kane France. Head coach: Bernard Diomède The final squad was announced on 13 May 2019. Saudi Arabia. Head coach: Khaled Al-Atwi Group F. Portugal. Head coach: Hélio Sousa The 22-man provisional squad was announced on 10 May 2019. South Korea. Head coach: Chung Jung-yong The final  squad was announced on 2 May 2019. On 12 May, Lee Kyu-hyuk was announced as a replacement for Jeong Woo-yeong after Bayern Munich declined to release him. Argentina. Head coach: Fernando Batista The final squad was announced on 3 May 2019. South Africa. Head coach: Thabo Senong The final squad was announced on 14 May 2019.