The 2018 South American Under-20 Women's Football Championship was the eighth edition of the South American Under-20 Women's Football Championship (), the biennial international youth football championship organised by CONMEBOL for the women's under-20 national teams of South America. The tournament was held in Ecuador between 13 and 31 January 2018.
The top two teams of the tournament qualified for the 2018 FIFA U-20 Women's World Cup in France as the CONMEBOL representatives.
Brazil were crowned champions and maintained their streak of winning all eight editions so far.
All ten CONMEBOL member national teams are eligible to enter the tournament.
The matches were played in three venues in three cities.
The draw of the tournament was held on 14 December 2017, 19:00 ECT (), at the Casa de la Selección in Quito. The ten teams were drawn into two groups of five teams. The hosts Ecuador and the defending champions Brazil were seeded into Groups A and B respectively, while the remaining teams were placed into four "pairing pots" according to their results in the 2015 South American Under-20 Women's Football Championship: VenezuelaâÂÂColombia, ArgentinaâÂÂChile, ParaguayâÂÂUruguay, BoliviaâÂÂPeru.
Players born on or after 1 January 1998 are eligible to compete in the tournament. Each team could register a maximum of 22 players (three of whom must be goalkeepers).
A total of 10 referees, 20 assistant referees, and two support referees were selected for the tournament.
In the first stage, the teams are ranked according to points (3 points for a win, 1 point for a draw, 0 points for a loss). If tied on points, tiebreakers are applied in the following order (Regulations Article 18.1):
The top two teams of each group advance to the final stage.
All times are local, ECT ().
In the final stage, the teams are ranked according to points (3 points for a win, 1 point for a draw, 0 points for a loss). If tied on points, tiebreakers are applied in the following order, taking into account only matches in the final stage (Regulations Article 18.2):
The following two teams from CONMEBOL qualified for the 2018 FIFA U-20 Women's World Cup.