2008–09 Boston Celtics season Game log January

| Game | Date_ | Team | Score | High_points | High_rebounds | High_assists | Location_Attendance | Record |
|---|---|---|---|---|---|---|---|---|
| 38 | January 9 | @ Cleveland | L 83–98 (OT) | Kevin Garnett (18) | Kevin Garnett (15) | Rajon Rondo (13) | Quicken Loans Arena 20,562 | 29–9 |
| 39 | January 11 | @ Toronto | W 94–88 (OT) | Ray Allen (36) | Kevin Garnett , Glen Davis (11) | Rajon Rondo (11) | Air Canada Centre 19,800 | 30–9 |
| 40 | January 12 | Toronto | W 115–109 (OT) | Paul Pierce (39) | Kevin Garnett (12) | Rajon Rondo (8) | TD Banknorth Garden 18,624 | 31–9 |
| 41 | January 14 | New Jersey | W 118–86 (OT) | Paul Pierce (22) | Kevin Garnett (9) | Rajon Rondo (12) | TD Banknorth Garden 18,624 | 32–9 |
| 42 | January 17 | @ New Jersey | W 105–85 (OT) | Ray Allen (25) | Kevin Garnett (10) | Rajon Rondo (14) | Izod Center 17,578 | 33–9 |