The 2017 South American U-20 Championship was an international association football tournament held in Ecuador. The ten national teams involved in the tournament were required to register a squad of 23 players; only players in these squads are eligible to take part in the tournament.
Each player had to have been born after 1 January 1997. All ages as of start of the tournament.
Players name marked in bold have been capped at full international level.
Group A
Brazil
Head coach: Rogério Micale
Chile
Head coach: Héctor Robles
Colombia
Head coach: Carlos Restrepo
Ecuador
Head coach: José Javier Rodríguez Mayorga
Jhon Pereira (11) and Byron Castillo (13) were excluded.