1990–91 Boston Celtics season Game log December

| Game | Date_ | Opponent | Score | Location_ | Record |
|---|---|---|---|---|---|
| 15 | Sat. Dec. 1 | @ Philadelphia 76ers | 110-116 | The Spectrum | 12-3 |
| 16 | Mon. Dec. 3 | Seattle SuperSonics | 135-102 | Boston Garden | 13-3 |
| 17 | Wed. Dec. 5 | Denver Nuggets | 148-140 | Boston Garden | 14-3 |
| 18 | Fri. Dec. 7 | @ Dallas Mavericks | 112-104 | Reunion Arena | 15-3 |
| 19 | Sat. Dec. 8 | @ San Antonio Spurs | 96-102 | HemisFair Arena | 15-4 |
| 20 | Mon. Dec. 10 | @ Houston Rockets | 107-95 | The Summit | 16-4 |
| 21 | Wed. Dec. 12 | Milwaukee Bucks | 129-111 | Boston Garden | 17-4 |
| 22 | Fri. Dec. 14 | Detroit Pistons | 108-100 | Boston Garden | 18-4 |
| 23 | Sat. Dec. 15 | @ Miami Heat | 114-100 | Miami Arena | 19-4 |