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| Dates | May 21 – June 7 | |||||||||
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| MVP | Wes Unseld (Washington Bullets) | |||||||||
| Hall of Famers | SuperSonics: Dennis Johnson (2010) Jack Sikma (2019) Bullets: Bob Dandridge (2021) Elvin Hayes (1990) Wes Unseld (1988) Coaches: Lenny Wilkens (1989, player/1998, coach) Officials: Darell Garretson (2016) Earl Strom (1995) | |||||||||
| Eastern finals | Bullets defeated 76ers, 4–2 | |||||||||
| Western finals | SuperSonics defeated Nuggets, 4–2 | |||||||||
The 1978 NBA World Championship Series was the championship round of the National Basketball Association (NBA)'s 1977–78 season, and the culmination of the season's playoffs. The series featured the Western Conference champion Seattle SuperSonics against the Eastern Conference champion Washington Bullets. The Bullets defeated the SuperSonics in seven games to win their first NBA championship. Bullets power forward/center Wes Unseld was named MVP of the series. Before the Cleveland Cavaliers' Game 7 win at Golden State in the 2016 NBA Finals, this was the last time a road team had won Game 7 in the NBA Finals. The 1978 World Championship Series was the first NBA Finals series since the 1958 World Championship Series in which both teams had under 50 wins, and is the only NBA Finals to feature two teams with under 50 wins in an 82-game season.