2003 World Junior Ice Hockey Championships

The 2003 IIHF World U20 Championship, commonly referred as the 2003 World Junior Hockey Championships (2003 WJHC), was the 27th edition of the World Junior Ice Hockey Championships. The tournament was held in Halifax and Sydney, Nova Scotia, Canada from December 26, 2002 to January 5, 2003. Russia won the gold medal for the second consecutive year with a 3–2 victory over Canada in the championship game, while Finland won the bronze medal with a 3–2 victory over the United States.

Group A
All times local (AST/UTC-4).

Group B
All times local (AST/UTC-4).

Relegation round
Results from any games played during the preliminary round were carried forward to the relegation round.

All times local (AST/UTC-4).

 and were relegated to Division I for the 2004 World Junior Ice Hockey Championships.

Division I
The following teams took part in the Division I tournament. Group A played in Almaty, Kazakhstan between December 27, 2002 and January 2, 2003. Group B played in Bled, Slovenia between December 16 and December 22, 2002.

Group A
 was promoted to the Top Division and was relegated to Division II for the 2004 World Junior Ice Hockey Championships.

Group B
 was promoted to the Top Division and was relegated to Division II for the 2004 World Junior Ice Hockey Championships.

Division II
The following teams took part in the Division II tournament. Group A played in Miercurea-Ciuc, Romania between January 6 and January 12, 2003. Group B played in Novi Sad, Federal Republic of Yugoslavia between December 28, 2002 and January 3, 2003.

Group A
 was promoted to Division I and was relegated to Division III for the 2004 World Junior Ice Hockey Championships.

Group B
 was promoted to Division I and was relegated to Division III for the 2004 World Junior Ice Hockey Championships.

Division III
The following teams took part in the Division II tournament. This group played in Izmit, Turkey between January 21 and January 26, 2003.  and were promoted to Division II for the 2004 World Junior Ice Hockey Championships.