The 1984 World Junior Ice Hockey Championships (1984 WJHC) was the eighth edition of the Ice Hockey World Junior Championship. It was held from December 25, 1983, to January 3, 1984, in Norrköping and Nyköping, Sweden. The Soviet Union won its second consecutive gold medal and sixth overall. Finland won silver and Czechoslovakia bronze.
Pool A
The 1984 tournament was a round-robin format, with the top three teams winning gold, silver and bronze medals respectively.
The second tier was contested from March 19–25, in Caen, France. Eight teams were divided into two round robin groups where the top two, and bottom two, graduated to meet their respective opponents in a final round robin. Results between competitors who migrated together were carried forward.
This year, Pool C used the same format as Pool B. It was played in Varese Italy from March 25 to 31. Seven countries participated along with a second Italian team that received no official ranking. British and Spanish junior teams made their debut this year.