2003 FIBA World Championship for Young Women

The 2003 FIBA World Championship for Young Women was the first edition of the basketball world championship for U21 women's teams, later known as the FIBA Under-21 World Championship for Women. It was played in Šibenik, Croatia, from 25 July to 3 August 2003. United States women's national under-21 basketball team won the tournament and became the world champions for the first time.

First round
In the first round, the teams were drawn into two groups of six. The first four teams from each group advance to the quarterfinals, the other teams will play in the 9th–12th place playoffs.