National nature reserves in Wales are administered by Natural Resources Wales (formerly the Countryside Council for Wales). There are 67 reserves.
(Gwynedd, Conwy, Wrexham, Flintshire and Denbighshire)
Allt y BenglogCeunant CynfalCeunant LlennyrchCoed CamlynCoed CymerauCoed DolgarrogCoed GanllwydCoed GorswenCoed TremadogCoed y RhygenCoedydd AberCoedydd MaentwrogCors GeirchCwm Glas CrafnantCwm IdwalFenn's, Whixall and Bettisfield Mosses NNR (partly in England)Hafod Elwy MoorHafod GarregogMaes y FacrellMorfa DyffrynMorfa HarlechRhinogY BerwynYnys EnlliYr WyddfaCors BodeilioCors ErddreiniogCors GochNewborough Warren(Ceredigion, north Powys, north Carmarthenshire)
Allt Rhyd y GroesCadair IdrisClaerwenCoed RheidolCors CaronDyfiLlyn EiddwenRhos GochRhos Llawr CwrtRoundton HillStanner Rocks(Pembrokeshire, south Carmarthenshire, Bridgend, south Powys, Swansea, Monmouthshire and the county boroughs of the South Wales valleys)
CarmelCoedmorCoed-y-CerrigCoombe Valley WoodsCors Goch, LlanllwchCorsydd LlangloffanCors y LlynCraig Cerrig-gleisiad a Fan FrynychCraig y CilauCrymlyn Bog and Pant y SaisCwm ClydachDan yr OgofDinefwr ParkFiddlers ElbowGower CoastGrassholm IslandKenfig Pool and dunesLady Park WoodMerthyr MawrNant IrfonNewport WetlandsOgof Ffynnon DduOxwichPengelli ForestPenhow WoodlandsRamsey IslandRhos GochSkomer IslandTy CanolStackpoleWhiteford