List of Sites of Special Scientific Interest in Radnor

This is a list of the Sites of Special Scientific Interest (SSSIs) in the Radnor Area of Search. For SSSIs elsewhere in Wales, see List of SSSIs by Area of Search.

* Aberithon and Bedw Turbaries
* Bach Howey Gorge
* Bach-y-graig Stream Section
* Banc Hirllwyn
* Burfa Boglands
* Caban Lakeside Woodlands
* Cae Aber-Glanhirin
* Cae Coed-gleision
* Cae Cwm-bach
* Cae Cwm-rhocas (Cwm Roches Meadow)
* Cae Henfron
* Cae Llwyn
* Caeau Bryn-du
* Caeau Coed Mawr (Coedmawr Fields)
* Caeau Hirnant
* Caeau Penglaneinon
* Caeau Troed-Rhiw-Drain (Troed-Rhiw-Drain Meadows)
* Caeau Wern
* Cerrig-gwalch
* Cilcenni Dingle
* Ciliau
* Coed Aberdulas
* Coed Aberedw
* Coed Bryn-Person
* Coed y Cefn
* Coed yr Allt-goch
* Coed-mawr Quarry
* Coedydd Glannau a Cwm Coel
* Colwyn Brook Marshes (North & South)
* Cors Cae'r Neuadd
* Cors Ty-Llwyd
* Cors Y Llyn
* Crabtree Green Meadow
* Craig Fawr
* Cwm Gwynllyn
* Cwm-gwanon Dingle and Pasture
* Cwm-Illa Brook Marsh
* Cwmsaise
* Dolyhir Meadows
* Dolyhir Quarry
* Far Hall Meadow
* Glascwm and Gladestry Hills
* Gwernaffel Dingle
* Gwern-yfed-fach Quarry
* Gweunydd Camnant
* Gweunydd Coch-y-dwst
* Gweunydd Crychell
* Gweunydd Dwfnant (Dwfnant Pasture)
* Gweunydd Esgairdraenllwyn (Esgairdraenllwyn Pastures)
* Gweunydd Nant y Dernol
* Gweunydd Ty'n-y-Llidiart
* Howey Brook Stream Section
* Ithon Valley Woodlands
* Lake Wood, Llandrindod Wells
* Lane Farm Pastures
* Llan Bwch-llyn Lake
* Llandeilo, Rhulen and Llanbedr Hills
* Llanelwedd Rocks
* Llanfawr Quarries, Llandrindod Wells
* Llymwynt Brook Pastures
* Lower Caerfaelog Pastures
* Maelienydd
* Marcheini Uplands, Gilfach Farm & Gamallt
* Moity and Garth Dingles and Fron Wood
* Moorlands Pastures
* New Castle Meadows
* New House Meadow
* Newmead
* Pen-cerrig Stream Section
* Pen-Common, Llanbedr
* Pentrosfa Mire
* Radnor Forest
* Rhagnentydd Gwy Uchaf / Upper Wye Tributaries
* Rhos Dwfnant
* Rhos Goch (Rhos Goch Common)
* Rhos Pant-tyle
* Rhos Penrhiw
* Rhos Rhyd-y-ceir
* Rhos yr Hafod
* River Lugg
* River Teme
* River Wye (Tributaries)/Afon Gwy (Isafonydd)
* Stanner Rocks
* The Wern, Rhosgoch
* Trecoed/Castle Crab
* Twenty-five Acre Wood
* Upper Nantserth Pasture