2025 World Junior Ice Hockey Championships – Division I
| Tournament details | |
|---|---|
| Host countries | Slovenia Estonia |
| Venue(s) | 2 (in 2 host cities) |
| Dates | 9–15 December 2024 11–17 January 2025 |
| Teams | 12 |
The 2025 World Junior Ice Hockey Championship Division I consisted of two international under-20 ice hockey tournaments organized by the International Ice Hockey Federation. Division I A represents the second tier and Division I B the third tier of the IIHF World Junior Championship. For each tier's tournament, the first-placed team was promoted to the next higher division, while the bottom-placed team was relegated to a lower division.
To be eligible as a junior player in these tournaments, a player couldn't be born earlier than 2005.