The 1984 NBA playoffs was the postseason tournament of the National Basketball Association's 1983–84 season.

Going into the 1984 playoffs, the Lakers had already won 2 titles in the 1980s and the Celtics 1, making the revival of the Celtics–Lakers rivalry arguably inevitable and certainly highly anticipated.

The New Jersey Nets won a playoff series for the first time in their NBA history, upsetting the defending champion Philadelphia 76ers in 5.

This was also the only time the road team won every game in a five-game playoff series.

This was the final postseason appearance for the Kansas City Kings, as the team moved to Sacramento, California two seasons later.

However, the Kingdome continued to host Sonics regular season games on occasion until 1994.

Game 5 of the First Round between the Knicks and Pistons was played at Joe Louis Arena, as the Pontiac Silverdome was unavailable, with temperatures reaching as high as 120°.