Head to Head
| Premiership Rugby | 2021/03/07 15:00 | Harlequins v Northampton | W | 37-19 |
| Premiership Rugby | 2020/11/28 14:00 | Northampton v Harlequins | W | 29-49 |
| Premiership Rugby | 2020/08/30 13:00 | Harlequins v Northampton | W | 30-17 |
| Premiership Rugby | 2019/11/01 19:45 | Northampton v Harlequins | L | 40-22 |
| Premiership Rugby | 2019/04/13 14:00 | Harlequins v Northampton | L | 19-20 |
| Premiership Rugby | 2018/09/07 18:45 | Northampton v Harlequins | L | 25-18 |
| LV Cup | 2018/02/02 19:45 | Northampton v Harlequins | L | 36-10 |
| Premiership Rugby | 2017/12/30 16:00 | Harlequins v Northampton | W | 50-21 |
Home History
| Premiership Rugby Cup | 2021/11/13 14:30 | Saracens Rugby Club v Harlequins | L | 28-21 |
| Premiership Rugby | 2021/11/07 16:30 | Wasps v Harlequins | W | 16-26 |
| Premiership Rugby | 2021/10/31 15:00 | Harlequins v Saracens Rugby Club | L | 22-29 |
| Premiership Rugby | 2021/10/23 14:00 | Harlequins v Bath | W | 31-17 |
| Premiership Rugby | 2021/10/15 18:45 | Sale Sharks v Harlequins | L | 28-22 |
| Premiership Rugby | 2021/10/08 18:45 | Harlequins v Bristol | W | 52-24 |
| Premiership Rugby | 2021/09/25 14:00 | Harlequins v Worcester Warriors | W | 35-29 |
| Premiership Rugby | 2021/09/19 14:00 | Newcastle Falcons v Harlequins | W | 20-26 |
Away History
| Premiership Rugby Cup | 2021/11/13 15:30 | Northampton v London Irish | L | 26-36 |
| Premiership Rugby | 2021/11/06 17:00 | Sale Sharks v Northampton | L | 30-6 |
| Premiership Rugby | 2021/10/30 14:00 | Northampton v Leicester | L | 26-55 |
| Premiership Rugby | 2021/10/22 18:45 | Northampton v Worcester Warriors | W | 66-10 |
| Premiership Rugby | 2021/10/10 14:00 | Wasps v Northampton | L | 26-20 |
| Premiership Rugby | 2021/10/02 13:00 | Northampton v London Irish | W | 23-21 |
| Premiership Rugby | 2021/09/25 14:00 | Exeter Chiefs v Northampton | W | 24-26 |
| Premiership Rugby | 2021/09/18 14:00 | Northampton v Gloucester | W | 34-20 |