|Eastern Finals:||Celtics defeated 76ers, 4–3|
|Western Finals:||Lakers defeated Bullets, 4–2|
The 1965 NBA World Championship Series was the championship round of the 1965 NBA playoffs, which concluded the National Basketball Association 1964–65 season.
The best-of-seven series was played between the Western Conference champion Los Angeles Lakers and the Eastern Conference champion Boston Celtics. The Celtics made their ninth-straight trip to the championship finals after beating the Philadelphia 76ers in a highly contested Eastern Division Finals that ended on John Havlicek's steal of the ball. The Lakers made it to their third Finals in four seasons after beating the Baltimore Bullets in six games, though it came at a cost: Elgin Baylor suffered a knee injury that would sideline him for the rest of the playoffs. The Celtics won the series over the Lakers, 4–1.
1965 NBA Playoffs
|Los Angeles Lakers (Western Division Champion)||Boston Celtics (Eastern Division Champion)|
1st Western, 4th Overall
|Regular season||62–18 (.775)
1st Eastern, 1st Overall
|Earned first-round bye||Division Semifinals||Earned first-round bye|
|Defeated the (3) Baltimore Bullets, 4–2||Division Finals||Defeated the (3) Philadelphia 76ers, 4–3|