1990–91 Boston Celtics season Game log January

| Game | Date_ | Opponent | Score | Location_ | Record |
|---|---|---|---|---|---|
| 38 | Mon. Jan. 21 | @ Detroit Pistons | 90-101 | The Palace of Auburn Hills | 29-9 |
| 39 | Wed. Jan. 23 | Detroit Pistons | 111-94 | Boston Garden | 30-9 |
| 40 | Fri. Jan. 25 | @ Philadelphia 76ers | 94-116 | The Spectrum | 30-10 |
| 41 | Sun. Jan. 27 | Los Angeles Lakers | 87-104 | Boston Garden | 30-11 |
| 42 | Mon. Jan. 28 | @ Minnesota Timberwolves | 108-87 | Target Center | 31-11 |
| 43 | Wed. Jan. 30 | Orlando Magic | 144-102 | Boston Garden | 32-11 |