Division II A represents the fourth tier and Division II B the fifth 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.

The Division II A tournament was played in Zagreb, Croatia, from 6 to 12 January 2025.

GP = Games played; G = Goals; A = Assists; Pts = Points; +/− = P Plus–minus; PIM = Penalties In Minutes Source: IIHF (minimum 40% team's total ice time) TOI = Time on ice (minutes:seconds); GA = Goals against; GAA = Goals against average; Sv% = Save percentage; SO = Shutouts Source: IIHF Source: IIHF The Division II B tournament was played in Belgrade, Serbia, from 19 to 25 January 2025.

GP = Games played; G = Goals; A = Assists; Pts = Points; +/− = P Plus–minus; PIM = Penalties In Minutes Source: IIHF (minimum 40% team's total ice time) TOI = Time on ice (minutes:seconds); GA = Goals against; GAA = Goals against average; Sv% = Save percentage; SO = Shutouts Source: IIHF Source: IIHF