The England captain scored six times in seven appearances to claim the prize for the tournament's top scorer.
The Tottenham forward is the first England player to win the award since Gary Lineker, who scored six times in the 1986 finals.
Kane finished two goals ahead of Belgium striker Romelu Lukaku, Russia's Denis Cheryshev, Portugal star Cristiano Ronaldo and France duo Antoine Griezmann and Kylian Mbappe, the latter two both scoring in France's 4-2 final victory over Croatia.
6 - With six goals, Harry Kane has become only the second English player to ever win the World Cup Golden Boot, after @GaryLineker in 1986. Trophy.#WorldCupFinal#WorldCup #ENG pic.twitter.com/9vCl0nmtyx
— OptaJoe (@OptaJoe) July 15, 2018
Congratulations to @HKane on winning the golden boot. Welcome to the club, young man.
— Gary Lineker (@GaryLineker) July 15, 2018
The 24-year-old only scored three of his goals from open play, two of which were headers in the 2-1 opening group win over Tunisia. His other came when he deflected in a Ruben Loftus-Cheek shot against Panama.
Kane's other three goals came from the penalty spot: two against Panama, and one in the last-16 game with Colombia.
Photo Getty. Caption: England captain Harry Kane