The 2023 IIHF U18 World Championship was the 24th such event hosted by the International Ice Hockey Federation.

The tournament was held in Basel and Porrentruy, Switzerland, from 20 to 30 April 2023.

[4] Winning teams will be reseeded in accordance with the following ranking:[5] GP = Games played; G = Goals; A = Assists; Pts = Points; +/− = Plus–minus; PIM = Penalties In MinutesSource: IIHF (minimum 40% team's total ice time) TOI = Time on ice (minutes:seconds); GA = Goals against; GAA = Goals against average; SA = Shots against; Sv% = Save percentage; SO = ShutoutsSource: IIHF Source: IIHF Source: [6] The tournament was played in Angers, France, from 23 to 29 April 2023.

The tournament was played in Sofia, Bulgaria, from 27 March to 2 April 2023.

The tournament was played in Cape Town, South Africa, from 13 to 16 March 2023.