| Cardiff vs | Monmouthshire | ||||
| Matches | 3 | ||||
| Won | 1 | ||||
| Lost | 2 | ||||
| Drawn | 0 | ||||
| Points For | 15 | ||||
| Points Against | 10 | ||||
| Date | Home | Away | Venue | ||
| 21/12/1918 | Monmouthshire | 5 | 0 | Cardiff | Unknown |
| 08/02/1919 | Cardiff | 6 | 10 | Monmouthshire | Cardiff Arms Park, Cardiff |
| 01/05/1920 | Cardiff | 4 | 0 | Monmouthshire | Cardiff Arms Park, Cardiff |
