The FIBA Under-18 Women's AmeriCup, previously known as the FIBA Under-18 Women's Americas Championship, is the Americas basketball championship for women's under-18 national teams that takes place every two years in the FIBA Americas zone.

Before the 2004 edition, the tournament was played by under-19 teams.

The top four finishers qualify for the FIBA Under-19 Women's Basketball World Cup.