The 2017 IIHF World Championship, the 2017 edition of the annual Ice Hockey World Championships, was held from 5 to 21 May 2017 in Cologne, Germany and Paris, France. The official tournament mascots were Asterix and Obelix, the main characters from popular French comic book series The Adventures of Asterix. The logo incorporates the silhouette of deceased German national team goaltender Robert Müller, who succumbed to a brain tumor at just 28 years of age. German tennis player Angelique Kerber, 1. FC Köln and German Olympic soccer team goalkeeper Timo Horn and Paris Saint-Germain F.C.'s Brazilian winger Lucas Moura were named celebrity ambassadors for the event.

Sweden won the tournament by defeating Canada 2–1 after a penalty shoot-out. Russia won the bronze medal game, defeating Finland 5–3.

There were two official bids to host these championships.

The decision on who hosts the tournament was decided on May 17, 2013 in Stockholm, Sweden. The united bid of France and Germany received 63 votes, while the bid of Denmark and Latvia received 45.

The seeding in the preliminary round was based on the 2016 IIHF World Ranking, which ended at the conclusion of the 2016 IIHF World Championship.

Each team's roster consisted of at least 15 skaters (forwards, and defencemen) and 2 goaltenders, and at most 22 skaters and 3 goaltenders. All 16 participating nations, through the confirmation of their respective national associations, had to submit a "Long List" no later than two weeks before the tournament, and a final roster by the Passport Control meeting prior to the start of tournament.

The IIHF selected 16 referees and 16 linesmen to work the tournament.

The schedule was announced on 9 August 2016.