The 2010 World Junior Hockey Championships (2010 WJHC), was the 34th edition of Ice Hockey World Junior Championship. The tournament was hosted by Saskatoon and Regina, Saskatchewan, Canada, from December 26, 2009, to January 5, 2010. Saskatoon had hosted the tournament once before, in 1991. The medal round, as well as all Canada's preliminary round games, took place in Saskatoon at the Credit Union Centre. The arena underwent renovations and upgrades before the 2010 tournament, including an increase in capacity. Other games were played at the Brandt Centre in Regina, which also received upgrades. In addition, pre-tournament exhibition games were held in other towns and cities throughout the province as well as Calgary, Alberta. In the gold medal match, the United States defeated the pre-tournament favourites and host country Canada 6–5 in overtime on a goal by John Carlson to win their second gold medal and first since 2004, ending Canada's bid for a record-breaking sixth consecutive gold medal.

Other host candidates

Initially, Switzerland was chosen to host the tournament, but later withdrew. Three bid groups submitted letters of intent to host the 2010 tournament prior to the February 1, 2008, deadline: All three bid groups formally placed their bids before the April 1, 2008, deadline and made their final presentations to the selection committee in Toronto on June 9–10, 2008. On July 7, 2008, Hockey Canada and the Canadian Hockey League (CHL) announced Saskatoon and Regina have been chosen to host the tournament. This was Saskatchewan's first successful bid in five recent attempts, after failing to land the 1999, 2003, 2006 and 2009 tournaments.

Venues

Top division

The lowest-ranked teams in the top division are relegated to Division I for the following year's tournament.

Rosters

Preliminary round

Ten teams were divided into two groups of five, each of which play in a single round-robin format. The winner of each group proceeded directly to the tournament semifinals, with the second- and third-place finishers advancing to the quarterfinals. The remaining four teams participated in the relegation round to determine which teams will be relegated to Division I the following year.

Group A

All times are local (Central Time Zone – UTC−6).

Group B

All times are local (Central Time Zone – UTC−6).

Relegation round

Results from any games that were played during the preliminary round were carried forward to the relegation round. All times are local (Central Time Zone – UTC−6).

Final round

*** Decided in overtime.**

Quarterfinals

Semifinals

5th place playoff

Bronze medal game

Gold medal game

Top 10 scorers

Top 10 goalscorers

Goaltending leaders

(minimum 40% team's total ice time)

Tournament awards

Final standings

IIHF broadcasting rights

Division I

Group A

The Division I Group A tournament was played in Megève and Saint-Gervais-les-Bains, France, from December 14 to December 20, 2009.

Group B

The Division I Group B tournament was played in Gdańsk, Poland, from December 14 to December 20, 2009.

Division II

Group A

The Division II Group A tournament was played in Debrecen, Hungary, from December 13 to December 19, 2009.

Group B

The Division II Group B tournament was played in Narva, Estonia, from December 12 to December 18, 2009.

Division III

The Division III tournament was played in Istanbul, Turkey, from January 4 to January 10, 2010.

Play-offs

Final standings