This is a list of the Sites of Special Scientific Interest (SSSIs) in the Powys Area of Search (AoS).^[1]

References

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

v t e Powys
Principal settlements	Brecon Builth Wells Crickhowell Hay-on-Wye Knighton Llandrindod Wells Llanfair Caereinion Llanfyllin Llanidloes Llanwrtyd Wells Machynlleth Montgomery Newtown Presteigne Rhayader Talgarth Welshpool Ystradgynlais
Communities	Abbey Cwmhir Aberedw Aberhafesp Abermule with Llandyssil Banwy Bausley with Criggion Beguildy Berriew Bettws Brecon Bronllys Builth Cadfarch Caersws Carno Carreghofa Castle Caereinion Churchstoke Cilmery Clyro Cray Crickhowell Cwmdu and District Disserth and Trecoed Duhonw Dwyriw Erwood Felin-fach Forden with Leighton and Trelystan Gladestry Glantwymyn Glasbury Glascwm Glyn Tarell Guilsfield Gwernyfed Hay Honddu Isaf Kerry Knighton Llanafan Fawr Llanbadarn Fawr Llanbadarn Fynydd Llanbister Llanbrynmair Llanddew Llanddewi Ystradenny Llandinam Llandrindod Wells Llandrinio Llandysilio Llanelwedd Llanerfyl Llanfair Caereinion Llanfechain Llanfihangel Llanfihangel Rhydithon Llanfrynach Llanfyllin Llangamarch Llangattock Llangedwyn Llangors Llangunllo Llangurig Llangynidr Llangyniew Llangynog Llanidloes Llanidloes Without Llanigon Llanrhaeadr-ym-Mochnant Llansantffraid Llansilin Llanwddyn Llanwrthwl Llanwrtyd Wells Llanyre Llywel Machynlleth Maescar Manafon Meifod Merthyr Cynog Mochdre with Penstrowed Montgomery Nantmel New Radnor Newtown and Llanllwchaiarn Old Radnor Painscastle Pen-y-bont-fawr Penybont Presteigne Rhayader St Harmon Talgarth Talybont-on-Usk Tawe-Uchaf Trallong Trefeglwys Treflys Tregynon Trewern Vale of Grwyney Welshpool Whitton Yscir Ystradfellte Ystradgynlais
Towns and villages	Abbeycwmhir Aber Clydach Aberbechan Aberbran Abercegir Abercraf Abercynllaith Aberedw Abergwesyn Abergwydol Aberhafesp Aberhosan Abermule Abernant Abertridwr Aberyscir Adfa Aithnen Arddlin Bacheldre Beguildy Berriew Bettws Cedewain Beulah Bont Dolgadfan Boughrood Bronllys Builth Wells Burgedin Buttington Bwlch Caehopkin Caersws Capel-y-ffin Carno Cathedine Cefnllys Cemmaes Road Church Stoke Cilmery Clatter Clyro Coelbren Commins Coch Crickhowell Criggion Crossgates Cwmdauddwr Cwmdu Cwmtwrch Cwmwysg Cwrt-y-Gollen Derwenlas Dolanog Dolfach Dolyhir Dylife Erwood Esgairgeiliog Forge Four Crosses, Montgomeryshire Four Crosses, Llanfair Caereinion Gladestry Glasbury Hay-on-Wye Heartsease (Knighton) Heartsease (Llanddewi Ystradenni) Heol Senni Kerry Knucklas Libanus Llan Llanafan Fawr Llanbrynmair Llanddew Llandinam Llandrinio Llandysilio Llanelwedd Llanfair Caereinion Llanfechain Llanfihangel Nant Bran Llanfihangel Talyllyn Llanfyllin Llangadfan Llangammarch Wells Llangedwyn Llangors Llangurig Llangynidr Llangynog Llangynyw Llanllwchaiarn Llanrhaeadr-ym-Mochnant Llansantffraed Llansanffraid-ym-Mechain Llansilin Llanwchaiarn Llanwrin Llanwrthwl Llanwrtyd Wells Llanwrtyd Llanymynech Llanyre Llawryglyn Llyswen Llywel Meifod Milebrook Morben Nant Glas New Radnor Newbridge-on-Wye Newchurch Old Church Stoke Painscastle Pandy Pant-y-Dwr Partrishow Penegoes Pennant Penwyllt Penybont Pilleth Plas Esgair Pont Crugnant Pontdolgoch Pontrobert Sarn Sennybridge Soar St Harmon Staylittle Sycharth Talerddig Talgarth Talybont-on-Usk Three Cocks Tirabad Trecastle Trefeglwys Tregynon Trewern Tylwch Van, Llanidloes Ystradfellte
Castles	Aberysgir Castle Aberedw Castle Castell Dinas Castell Du Cefnllys Castle Colwyn Castle Dolforwyn Castle Llangoed Hall Mediomanum Montgomery Castle Painscastle Powis Castle Tretower Castle
Reservoirs and lakes	Beacons Reservoir Cantref Reservoir Clywedog Reservoir Elan Valley Reservoirs Llangorse Lake Lake Vyrnwy Talybont Reservoir
Topics	Parliamentary constituencies Electoral wards Places Schools SSSIs Scheduled Monuments Country houses Listed buildings Grade I Grade II* Registered parks and gardens Lord Lieutenants High Sheriffs Museums Public art
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