The 2018 NBA Finals was the championship series of the National Basketball Association's (NBA) 2017–18 season and conclusion of the season's playoffs. In this best-of-seven playoff, the defending NBA champion and Western Conference champion Golden State Warriors swept the Eastern Conference champion Cleveland Cavaliers four games to zero. The Warriors became the 7th NBA franchise to win back-to-back championships, joining the Los Angeles Lakers, Boston Celtics, Detroit Pistons, Chicago Bulls, Houston Rockets, and Miami Heat. This year's Finals was the first time in any of North America's four major professional sports leagues that the same two teams met for the championship four years in a row. This was also the first time that a team was swept in the NBA Finals since 2007, in which the Cavaliers were also the losing team. LeBron James, in his eighth consecutive NBA Finals appearance and ninth appearance overall, suffered the second Finals sweep of his career, having also played in the 2007 Finals. Warriors small forward Kevin Durant was named NBA Finals MVP for the second straight year.

The NBA Finals is the annual championship series of the National Basketball Association (NBA). The Eastern and Western Conference champions play a best-of-seven-game series to determine the league champion. The team that wins the series is awarded the Larry O'Brien Championship Trophy, which replaced the original Walter A. Brown Trophy in 1977, though under the same name.