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 the 1955 NBA Playoffs; the 1967 NBA Playoffs featured an eight-team tournament with no first-round byes.
Champion: Los Angeles Lakers
Division Semifinals
(1) Los Angeles Lakers have division semifinals byes.
(2) Baltimore Bullets vs. (3) St. Louis Hawks: Hawks win series 3-0
Game 1 @ Baltimore (March 24): St. Louis 113, Baltimore 111
Game 2 @ Baltimore (March 27): St. Louis 105, Baltimore 100
Game 3 @ St. Louis (March 30): St. Louis 121, Baltimore 112
Division Finals
(1) Los Angeles Lakers vs. (3) St. Louis Hawks: Lakers win series 4-3
Game 1 @ Los Angeles (April 1): Los Angeles 129, St. Louis 106
Game 2 @ Los Angeles (April 3): Los Angeles 125, St. Louis 116
Game 3 @ St. Louis (April 6): St. Louis 120, Los Angeles 113
Game 4 @ St. Louis (April 9): Los Angeles 107, St. Louis 95
Game 5 @ Los Angeles (April 10): St. Louis 112, Los Angeles 100
Game 6 @ St. Louis (April 13): St. Louis 131, Los Angeles 127
Game 7 @ Los Angeles (April 15): Los Angeles 130, St. Louis 121
Champion: Boston Celtics
Division Semifinals
(1) Philadelphia 76ers have division semifinals byes.
(2) Boston Celtics vs. (3) Cincinnati Royals: Celtics win series 3-2
Game 1 @ Boston (March 23): Cincinnati 107, Boston 103
Game 2 @ Cincinnati (March 26): Boston 132, Cincinnati 125
Game 3 @ Boston (March 27): Cincinnati 113, Boston 107
Game 4 @ Cincinnati (March 30): Boston 120, Cincinnati 103
Game 5 @ Boston (April 1): Boston 112, Cincinnati 103
Division Finals
(1) Philadelphia 76ers vs. (2) Boston Celtics: Celtics win series 4-1
Game 1 @ Philadelphia (April 3): Boston 115, Philadelphia 96
Game 2 @ Boston (April 6): Boston 114, Philadelphia 93
Game 3 @ Philadelphia (April 7): Philadelphia 111, Boston 105
Game 4 @ Boston (April 10): Boston 114, Philadelphia 108 (OT)
Game 5 @ Philadelphia (April 12): Boston 120, Philadelphia 112
(2) Boston Celtics vs. (1) Los Angeles Lakers: Celtics win series 4-3
Game 1 @ Boston (April 17): Los Angeles 133, Boston 129 (OT)
Game 2 @ Boston (April 19): Boston 129, Los Angeles 109
Game 3 @ Los Angeles (April 20): Boston 120, Los Angeles 106
Game 4 @ Los Angeles (April 22): Boston 122, Los Angeles 117
Game 5 @ Boston (April 24): Los Angeles 121, Boston 117
Game 6 @ Los Angeles (April 26): Los Angeles 123, Boston 115
Game 7 @ Boston (April 28): Boston 95, Los Angeles 93
