This is a list of hillforts of Monmouthshire that have been registered with Cadw as historical monuments.[1] Welsh names are in brackets.
| Sam Number | Name | Community | OS Coordinates | Geographical coordinates | |
| MM027 | Blackcliff Wood | Tintern | ST529990 | 51.687°N -2.682°W | |
| MM025 | Gaer Hill Camp, Penterry (Allt y Gaer) | St Arvans | ST516979 | 51.677°N -2.7°W | |
| MM069 | The Larches | Caerwent | ST432899 | 51.605°N -2.82°W | |
| MM079 | Cae Camp (Bryngaer Colomendy) | Llanhennock | ST358938 | 51.639°N -2.927°W | |
| MM077 | Gaer hill fort, Trellech | Trellech | SO492037 | 51.73°N -2.735°W | |
| MM078 | Llancayo Camp (Llancayo) | Gwehelog Fawr | SO378038 | 51.729°N -2.902°W | |
| MM105 | Pen-rhiw or Great House hillfort | Llangwm | SO432033 | 51.726°N -2.823°W | |
| MM020 | Piercefield hillfort | St Arvans | ST536959 | 51.66°N -2.672°W | |
| MM093 | Bulwarks hillfort | Chepstow | ST538927 | 51.631°N -2.668°W | |
| MM135 | Candwr Camp (Bryngaer y Cawr) | Llanhennock | ST329934 | 51.635°N -2.969°W | |
| MM075 | Coed y Bwnydd hillfort | Llanarth | SO365068 | 51.756°N -2.92°W | |
| MM062 | Gaer Fawr, Llan-gwm | Llangwm | ST441988 | 51.685°N -2.809°W | |
| MM024 | Llanmelin Wood Camps (Coed Llanmelin) | Caerwent | ST461925 | 51.629°N -2.779°W | |
| MM064 | Pen-Twyn hillfort | Llanvihangel Crucorney | SO321229 | 51.901°N -2.987°W |