The 2003 FIBA Under-19 World Championship (Greek: 2003 Παγκόσμιο Πρωτάθλημα FIBA Under-19) was the 7th edition of the FIBA U19 World Championship. The men's U19 youth international basketball championship organized by FIBA. It was held in the Greek city of Thessaloniki from 10 to 20 July 2003. Australia won the tournament beating Lithuania 126–92 in the final. Andrew Bogut was named the tournament MVP.