Honours
Mens 1st Team
| SEMLA West Division 1 – Winners | 2009/10 |
| SEMLA Intermediate Flags – Winners | 2008, 2009, 2010 |
| SEMLA West Division 1 – Runner’s Up | 2007/08, 2008/09 |
| Welsh 8-a-sides – Winners | 2008/09, 2009/10 |
Mens A Team
| SEMLA West Division 2 – Winners | 2009/10 |
| SEMLA Minor Flags – Winners | 2010 |
| SEMLA West Division 2 – Runner’s Up | 2008/09 |
Ladies 1st Team
| West Area Tournament – Winners | 2008 |
Cardiff Harlequins Club Records
Mens 1st Team
| Largest Win | 30-0 (Away vs Exeter University, 20th Feb 2010) |
| Largest Defeat | 6-11 (Away vs Bath, 13th Dec 2008) |
Mens A Team
| Largest Win | 29-0 (Away vs Cheltenham Cougars 2nds, 31st October 2009) |
| Largest Defeat | 3-8 (Home vs Penarth, 8th Nov 2008) |
Cardiff Harlequins Individual Honours
Mens as at end of season 2009/10
| Overall Appearances | 49 – Andy Morgan |
| Overall Goals | 139 – Alan Croft |
| Overall Assists | 75 – Will Barrett |
| Overall Points | 199 – Will Barrett |
| Most Goals in a Season | 69 – Alan Croft 2008/09 |
| Most Goals in a Game | 12 – James Gibson, Away vs Cheltenham Cougars 2nds, 31st October 2009 |
| Most Points in a Game | 17 – James Gibson, Away vs Cheltenham Cougars 2nds, 31st October 2009 |