The 2004 World Junior Ice Hockey Championships (2004 WJHC) was held between December 26, 2003, and January 5, 2004, in Helsinki and Hämeenlinna, Finland.

[1] The United States won their first ever gold medal, defeating Canada 4–3 in the final.

GP = Games played; G = Goals; A = Assists; Pts = Points; +/− = Plus-minus; PIM = Penalties In Minutes Minimum 40% of team's ice time.

The Division II Championships were played on December 28, 2003 – January 3, 2004 in Sosnowiec, Poland (Group A) and on January 5–11, 2004 in Kaunas and Elektrėnai, Lithuania (Group B).

The Division III Championship was played on January 5–11, 2004 in Sofia, Bulgaria.