List of IIHF World Under-20 Championship medalists

The IIHF World Junior Championship is an annual event organized by the International Ice Hockey Federation for national under-20 ice hockey teams from around the world. It is traditionally held from late December to the beginning of January. The main tournament features the top ten ranked hockey nations in the world, comprising the "Top Division", from which a world champion is crowned. There are also three lower pools—divisions I, II and III—that each play separate tournaments playing for the right to be promoted to a higher pool with the last place team facing relegation to a lower pool.

The first official tournament was held in 1977. Prior to that, there had been invitational tournaments in 1974, 1975 and 1976 that were not sanctioned by the IIHF.

As of 2017, 41 official tournaments have been staged. Seven nations have won a gold medal and ten have won medals. Historically, the tournament has been dominated by Canada and the Soviet Union/Russia, together accounting for 29 of the 41 gold medals awarded. Canada leads the all-time gold medal count with 16 and have won a total of 30 medals, while the Soviet Union/Russia have won the most medals overall with 35.

These tournaments have been announced.

The unofficial tournaments held prior to 1977 are not included in this table.

Countries in italics no longer compete at the World Championships.

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