| Tournament details | |
|---|---|
| Dates | March 23–April 28, 1966 |
| Season | 1965–66 |
| Teams | 6 |
| Final positions | |
| Champions | Boston Celtics (9th title) |
| Runner-up | Los Angeles Lakers |
| Semifinalists | |
The 1966 NBA playoffs was the postseason tournament of the National Basketball Association's 1965–66 season. The tournament concluded with the Eastern Division champion Boston Celtics defeating the Western Division champion Los Angeles Lakers 4 games to 3 in the NBA Finals.
The Celtics won their eighth consecutive NBA title and ninth overall, defeating the Lakers in the Finals for a fifth straight time.
This was the last NBA playoffs under the "top team in each division gets a first-round bye" format established in 1955, although teams receiving a bye would be reused in 1975, and strictly for division winners from 1977–1983 (albeit in a four-round playoff format). the 1967 NBA playoffs featured an eight-team tournament with no first-round byes.