National Nature Reserves in Wales are administered by the Countryside Council for Wales in the United Kingdom. There are 67 reserves.

North Wales - Gwynedd, Conwy County, Wrexham County, Flintshire and Denbighshire

• Allt y Benglog
• Caunant Cynfal
• Ceunant Llennurch
• Coed Camlyn
• Coed Cymerau
• Coed Dolgarrog
• Coed Ganllwyd
• Coed Gorswen
• Coed Tremadog
• Coed y Rhygen
• Coedydd Aber
• Coedydd Maentwrog
• Cors Geirch
• Cwm Glas Crafnant
• Cwm Idwal
• Fenn's, Whixhall and Bettisfield Moss
• Hafod Elwy Moor
• Hafod Garregog
• Morfa Dyffryn
• Morfa Harlech
• Rhinog
• Y Berwyn
• Ynys Enlli
• Yr Wyddfa

Isle of Anglesey

• Cors Bodeilio
• Cors Erddreiniog
• Cors Goch
• Newborough Warren

Mid Wales - Ceredigion, North Powys, north Carmarthenshire

• Allt Rhyd y Groes
• Cadair Idris
• Claerwen
• Coed Rheidol
• Cors Caron
• Dyfi
• Llyn Eiddwen
• Rhos Goch
• Rhos Llawr Cwrt
• Rounton Hill
• Stanner Rocks

South Wales Pembrokeshire, south Carmarthenshire, Bridgend, Swansea, Monmouthshire and the counties of the South Wales valleys

• Carmel
• Coedmor
• Coed-y-Cerrig
• Coombe Valley Woods
• Cors Goch, Llanllwch
• Corsydd Llangloffan
• Cors y Llyn
• Craig Cerrig Gleisiad A Fran Frynych (Britain's most southerly location for arctic-alpine plants)
• Craig y Cilau
• Crmylyn Bog and Pant y Sais
• Cwm Clydach
• Fiddlers Elbow
• Gower Coast
• Grassholm Island
• Kenfig Pool and dunes
• Lady Park Wood
• Merthyr Mawr
• Nant Irfon
• Ogof Ffynnon Ddu
• Oxwich
• Pengelli Forest
• Penhow Woodlands
• Ramsey Island
• Rhos Goch
• Skomer Island
• Ty Canol
• Stackpole
• Whiteford

See also:

• National Nature Reserve
• National Nature Reserves in England
• National Nature Reserves in Scotland
• National Nature Reserves in Northern Ireland