Due to the exclusion of Russia and Belarus, the following changes in promotions and relegations were made: Latvia as the second-placed team of Division I A were promoted to the 2022 Top Division, their second Junior World Championship tournament this season.

In both tournaments, no team was relegated to a lower division.

The Division I A tournament was played in Hørsholm, Denmark, from 12 to 18 December 2021.

GP = Games played; G = Goals; A = Assists; Pts = Points; +/− = Plus–minus; PIM = Penalties In Minutes Source: IIHF.com (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.com Source: IIHF.com The Division I B tournament was played in Tallinn, Estonia, from 12 to 18 December 2021.

GP = Games played; G = Goals; A = Assists; Pts = Points; +/− = 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