Key Facts
| School Name | Ages | Pupil Numbers |
| Monmouth Schools Pre-Prep & Nursery | 3 – 7 | 130 girls and boys |
| Monmouth School Boys’ Prep | 7 – 11 | 125 boys |
| Monmouth School for Boys (including Sixth Form) | 11 – 18 | 565 boys |
| Monmouth School for Boys Sixth Form | 16 – 18 | 180 boys |
| Monmouth School Girls’ Prep | 7 – 11 | 144 girls |
| Monmouth School for Girls (including Sixth Form) | 11 – 18 | 489 girls |
| Monmouth School for Girls Sixth Form | 16 – 18 | 150 girls |
Boarding Houses
| Monmouth School for Boys and Boys’ Prep | |
| Junior Boarding: | 9 – 13 years – Chapel House |
| Senior Boarding: | 13 – 17 years – School House, New House and Weirhead house |
| 17 – 18 years – Buchanan House | |
| Monmouth School for Girls and Girls’ Prep | |
| Junior Boarding: | 7 – 13 years – School House |
| Senior Boarding: | 13 – 16 years – Twiston Davies House |
| 16 – 18 years – Augusta House | |