Below are the rosters for teams competing in the 2003 World Junior Ice Hockey Championships.
Group A edit
Russia edit
- Head coach: Rafail Ishmatov
United States edit
- Head coach: Lou Vairo
Slovakia edit
- Head coach: Robert Spišák
Switzerland edit
- Head coach: Jakob Kölliker
Belarus edit
- Head coach: Vladimir Melenchuk
Group B edit
Canada edit
- Head coach: Marc Habscheid
Finland edit
- Head coach: Erkka Westerlund
Czech Republic edit
- Head coach: Jaroslav Holík
Sweden edit
- Head coach: Peo Larsson
Germany edit
- Head coach: Ernst Höfner