Erie Otters star Connor McDavid helped lead Canada to its record 16th world junior hockey title and first since 2009, scoring a goal in a 5-4 victory over Russia on Monday night.
Anthony Duclair, Nick Paul, Max Domi and Sam Reinhart also scored to stake Canada to a 5-1 lead. Dmitri Yudin, Ivan Barbashev, Sergei Tolchinski and Nikolai Goldobin scored for Russia.
Zach Fucale made 26 saves for Canada.
Duclair scored 23 second into the game, and Paul made it 2-0 at 2:32, chasing Russian goalie Igor Shestyorkin. Yudin scored for Russia midway through the first.
McDavid, expected to be the top pick in the NHL draft, made it 3-1 early in the second, and Domi and Reinhart increased the lead to 5-1. Russia countered with three goals — two on power plays — in a 3:16 span.
In the third-place game, Slovakia beat Sweden, 4-2.
In the semifinals Sunday, Canada beat Slovakia, 5-1, and Russia topped Sweden, 4-1.
Pavol Skalicky broke a tie on a power play early in the third period for Slovakia.
Slovakia started the final period on a five-minute power play after Julius Bergman received a major penalty for interference and a game misconduct for felling Patrik Koys at the end of the second.
"I think the Swedes were disappointed from yesterday's game and we wanted to win today a little more," Slovak goalie Denis Godla said.
Godla made 26 saves to help Slovakia win its second medal after also finishing third in 1999.
"He's our hero. He's a rock star," forward Samuel Petras said of Godla.
David Soltes, Mislav Rosandic and Koys — into an empty net in the final minute — also scored.