This is a list of the Sites of Special Scientific Interest (SSSIs) in Monmouthshire.^[1]

Sites

Barbadoes Hill Meadows
Blackcliff-Wyndcliff
Blaentrothy Meadows
Blorenge
Brockwells Meadows
Brook Cottage, Llangibby
Bushy Close
Caeau Fferm
Caer Llan Wood
Cilwrgi Quarry
Cleddon Bog
Cleddon Shoots Woodland
Cobbler's Plain Meadows, Devauden
Coed-y-Cerrig National Nature Reserve
Coed-y-Person
Coombe Valley Woods
Croes Robert Wood
Cwm Clydach
Cwm Llanwenarth Meadows
Cwm Mill Section, Mardy
Cwm-Ton, Glascoed
Dinham Meadows
Fiddlers Elbow
Foxwood
Gaer House Woods
Gaer Wood, Llangoven
Gilwern Hill
Golden Hill Quarry, Devauden
Graig Wood
Gwent Levels - Magor and Undy
Gwent Levels - Redwick and Llandevenny
Harper's Grove – Lord's Grove
Livox Wood
Llandegveth Reservoir
Llanfihangel Moraine
Llangovan Church
Llanover Quarry
Llwyn y Celyn Wetland
Lower Ground, Penrhos
Lower Hael Wood
Lower Nex Meadows, Devauden
Maes-yr-Uchaf Wood
Magor Marsh
Mwyngloddfa Mynydd-Bach
Mynydd Llangatwg (Llangattock Mountain)
Nedern Brook Wetlands, Caldicot
Newton Court Stable Block
Park House Wood
Penarth Brook Woodlands
Penhow Woodlands
Penpergwm Pond
Pentwyn Farm Grasslands, Penallt
Pierce, Alcove and Piercefield Woods, Piercefield Park
Plantation Farm and the Gethley
Priory Wood
Rectory Meadow, Rogiet
Lower River Usk
Upper River Usk
River Usk (Tributaries) (Afon Wysg (Isafonydd))
Severn Estuary
Siambre Ddu
Strawberry Cottage Wood
Sugar Loaf Woodlands
Lower Wye Gorge SSSI
Upper Wye Gorge
Wye Valley Lesser Horseshoe Bat Site

See also

References

^ "Find protected areas of land and sea". Natural Resources Wales. Retrieved 9 January 2022.

v t e Monmouthshire principal area
Principal settlements	Abergavenny Caldicot Chepstow Monmouth Usk
Towns and villages	Bedwellty Betws Newydd Black Rock Blaenawey Bryngwyn Buckholt Botany Bay Catbrook Caer Llan Caerwent Chapel Hill Clydach Coed Morgan Coed-y-paen Crick Croes y pant Croes Hywel Cross Ash Crossway Cwmcarvan Cwmyoy Devauden Dingestow Dixton Earlswood Gaerllwyd Gilwern Glascoed Goetre Govilon Great Oak Grosmont Gwehelog Gwernesney Highmoor Hill Hoaldalbert Itton Kemeys Commander Kilgwrrwg Common Kingcoed Little Mill Llanarth Llanbadoc Llancayo Llanddewi Rhydderch Llandewi Skirrid Llandegveth Llandenny Llandevenny Llandogo Llanellen Llanelly Llanfair Kilgeddin Llanfihangel Rogiet Llanfihangel Crucorney Llanfoist Llangattock-Lingoed Llangattock-Vibon-Avel Llangovan Llangua Llangwm-isaf Llangybi Llanhennock Llanishen Llanllowell Llanover Llansoy Llanthony Llantilio Crossenny Llantilio Pertholey Llantrisant Llanvair-Discoed Llanvapley Llanvetherine Llanwenarth Llanvihangel-Ystern-Llewern Llanvihangel Gobion Magor Mamhilad Mardy Maryland Mathern Maypole Mitchel Troy Mitcheltroy Common Monkswood Mounton Mynydd-bach Mynyddislwyn Nant-y-derry New Inn New Mills Newbridge-on-Usk Newcastle Newchurch Oldcastle Pandy Parkhouse Pen-croes-oped Pen-how Pen-yr-hoel Pen-y-cae-mawr Pen-y-clawdd Pen-twyn Penallt Penpergwm Penperlleni Penrhos Portskewett Pwllmeyric Raglan Redbrook Redwick Rockfield Rogiet Shirenewton Skenfrith St Arvans St Brides Netherwent St. Maughans Sudbrook The Bryn Tintern Tredunnock Tregagle Tregare Trelleck Grange Trelleck Twyn-y-Sheriff The Narth Undy Upper Green Wernyrheolydd Whitebrook Whitson Wilcrick Wolvesnewton Wonastow Wyesham
Castles	Abergavenny Castle Betws newydd Caerleon Caldicot Castle Castell Arnold Chepstow Castle Dingestow Grosmont Castle Llangibby Llanfair Kilgeddin Llantrisant Llanvair Discoed Monmouth Newport Castle Newcastle Penhow Pencoed Castle Pen y Clawdd Castle Penrhos Raglan Castle Skenfrith Castle Trellech Usk Castle White Castle
Topics	Parliamentary constituencies Places Schools SSSIs Listed buildings Grade I Grade II* Scheduled Monuments Registered parks and gardens Country houses Lord Lieutenants High Sheriffs Museums Cuisine
Geography Wales

v t e SSSIs in the United Kingdom, grouped by Area of Search
England	Avon Bedfordshire Berkshire Buckinghamshire Cambridgeshire Cheshire Cleveland Cornwall County Durham Cumbria Derbyshire Devon Dorset East Riding of Yorkshire East Sussex Essex Gloucestershire Greater London Greater Manchester Hampshire Herefordshire Hertfordshire Isle of Wight Kent Lancashire Leicestershire Lincolnshire Merseyside Norfolk North Yorkshire Northamptonshire Northumberland Nottinghamshire Oxfordshire Rutland Shropshire Somerset South Yorkshire Staffordshire Suffolk Surrey Tyne and Wear Warwickshire West Midlands West Sussex West Yorkshire Wiltshire Worcestershire
Scotland	Angus and Dundee Annandale and Eskdale Badenoch and Strathspey Banff and Buchan Berwickshire and Roxburgh Caithness Clydesdale and South East Glasgow Cumnock and Kyle Dumbarton and North Glasgow Dunfermline and Kirkcaldy East Perth East Ross and Cromarty Edinburgh and West Lothian Falkirk and Clackmannan Gordon and Aberdeen Inverness Islay and Jura Kincardine and Deeside Kintyre Lorne Mid and East Lothian Mid Argyll and Cowal Moray and Nairn Mull, Coll and Tiree Nithsdale North East Fife North Lochaber North West Sutherland North Wester Ross and Cromarty Orkney Renfrew and Cunninghame Rum and the Small Isles Shetland Skye and Lochalsh South East Sutherland South Lochaber South Perth South Wester Ross and Cromarty Stirling Tweeddale and Ettrick and Lauderdale West Perth Western Isles North Western Isles South Wigtown and Stewartry
Wales	Brecknock Carmarthen & Dinefwr Ceredigion Clwyd East Gwynedd Gwent Mid & South Glamorgan Montgomery Preseli & South Pembrokeshire Radnor West Glamorgan West Gwynedd
Northern Ireland	County Antrim County Armagh County Down County Fermanagh County Londonderry County Tyrone

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