Ceredigion in the context of "River Dyfi"

West Wales (Welsh: Gorllewin Cymru) is a region of Wales.

It has various definitions, either covering Pembrokeshire, Ceredigion and Carmarthenshire, which historically comprised the Welsh principality of Deheubarth, and an alternative definition is to include Swansea and Neath Port Talbot, but exclude Ceredigion. The West Wales and the Valleys NUTS area also includes more westerly parts of North Wales as well as the South Wales Valleys.

The River Severn (Welsh: Afon Hafren, pronounced [ˈavɔn ˈhavrɛn]) is the longest river in Great Britain, with a length of 220 miles (354 km). It is also the river with the most voluminous flow of water by far in all of England and Wales, with an average flow rate of 107 m/s (3,800 cu ft/s) at Apperley, Gloucestershire. It rises in the Cambrian Mountains in mid Wales, at an altitude of 610 m (2,000 ft), on the Plynlimon massif, which lies close to the Ceredigion/Powys border near Llanidloes. The river then flows through Shropshire, Worcestershire and Gloucestershire. The county towns of Shrewsbury, Worcester and Gloucester lie on its course.

The Severn's major tributaries are the Vyrnwy, the Tern, the Teme, the Warwickshire Avon, and the Worcestershire Stour.

Pembrokeshire (/ˈpɛmbrʊkʃɪər, -ʃər/ PEM-bruuk-sheer, -⁠shər; Welsh: Sir Benfro [siːr ˈbɛnvrɔ]) is a county in the south-west of Wales. It is bordered by Carmarthenshire to the east, Ceredigion to the northeast, and otherwise by the sea. Haverfordwest is the largest town and administrative headquarters of Pembrokeshire County Council.

The county is generally sparsely populated and rural, with an area of 610 square miles (1,600 km) and a population of 123,400. After Haverfordwest, the largest settlements are Milford Haven (13,907), Pembroke Dock (9,753), and Pembroke (7,552). St Davids (1,841) is a city, the smallest by population in the UK. Welsh is spoken by 17.2 percent of the population, and for historic reasons is more widely spoken in the north of the county than in the south.

Mid Wales (Welsh: Canolbarth Cymru or simply Y Canolbarth, meaning "the midlands"), or Central Wales, is a region of Wales, encompassing its midlands, in-between North Wales and South Wales. The Mid Wales Regional Committee of the Senedd covered the unitary authority areas of Ceredigion and Powys and the area of Gwynedd that had previously been the district of Meirionnydd. A similar definition is used by the BBC. The Wales Spatial Plan defines a region known as "Central Wales" which covers Ceredigion and Powys.

Mid Wales is dominated by the Cambrian Mountains, including the Green Desert of Wales. The region is sparsely populated, with an economy dependent on farming and small businesses.

North West Wales (Welsh: Gogledd-Orllewin Cymru) is an area or region of Wales, commonly defined as a grouping of the principal areas of Conwy County Borough, Gwynedd and the Isle of Anglesey in the north-west of the country. These principal areas make up the entire preserved county of Gwynedd, and parts of Clwyd. It is bordered by Denbighshire, in North East Wales to the east, Powys, and Ceredigion in Mid Wales to the south, and the Irish sea to the north and west (as Cardigan Bay). It is the more mountainous, rural, and sparsely populated part of the north Wales geographic region.

Settlements include: Bangor, Caernarfon, Colwyn Bay, Holyhead, Llandudno, and Pwllheli. The port of Holyhead serves as the major sea link between Wales and Ireland. Snowdonia National Park is located wholly in the area, hosting Snowdon, the largest peak in British Isles excluding the Scottish Highlands. The area also hosts AONBs (Area of Outstanding Natural Beauty) in the Llŷn Peninsula and Isle of Anglesey, and the Castles and Town Walls of King Edward UNESCO World Heritage Site.

Gwynedd (Welsh: [ˈɡwɨnɛð]) is a county in the north-west of Wales. It borders Anglesey across the Menai Strait to the north, Conwy, Denbighshire, and Powys to the east, Ceredigion over the Dyfi estuary to the south, and the Irish Sea to the west. The city of Bangor is the largest settlement, and the administrative centre is Caernarfon. The preserved county of Gwynedd, which is used for ceremonial purposes, includes the Isle of Anglesey.

Gwynedd is the second largest county in Wales but sparsely populated, with an area of 979 square miles (2,540 km) and a population of 117,400. After Bangor (18,322), the largest settlements are Caernarfon (9,852), Bethesda (4,735), and Pwllheli (4,076). The county has the highest percentage of Welsh speakers in Wales, at 64.4%, and is considered a heartland of the language.

Powys (/ˈpoʊɪs, ˈpaʊɪs/ POH-iss, POW-iss, Welsh: [ˈpou̯ɪs]) is a county and preserved county in Wales. It borders Gwynedd, Denbighshire and Wrexham to the north; the English ceremonial counties of Shropshire and Herefordshire to the east; Monmouthshire, Blaenau Gwent, Merthyr Tydfil, Caerphilly, Rhondda Cynon Taf and Neath Port Talbot to the south; and Carmarthenshire and Ceredigion to the west. The largest settlement is Newtown, and the administrative centre is Llandrindod Wells.

Powys is the largest and most sparsely populated county in Wales, having an area of 5,181 km (2,000 sq mi) and a population of 135,059 in 2024. While largely rural, its towns include Welshpool in the north-east, Newtown in the north-centre, Llandrindod Wells in the south-centre, Brecon in the south, Ystradgynlais in the far south-west, and Machynlleth in the far west. The Welsh language can be spoken by 16.4% of the population. The boundaries of Powys largely follow those of the historic counties of Montgomeryshire, Radnorshire, and Brecknockshire.

Plynlimon, or Pumlumon in Welsh (also historically anglicised as Plinlimon, Plynlymmon or Plinlimmon), is the highest point of the Cambrian Mountains in Wales (taking a restricted definition of the Cambrian Mountains, excluding Snowdonia, the Berwyns and the Brecon Beacons), and the highest point in Mid Wales. It is a massif that dominates the surrounding countryside and is the highest point of Ceredigion.

The highest point of the massif itself is Pen Pumlumon Fawr, which is 752 metres (2,467 ft) above ordnance datum. Its other important peaks are Pen Pumlumon Arwystli, Y Garn, Pen Pumlumon Llygad-bychan and Pumlumon Fach. Bryn yr Ŵyn, or 'hill of the lambs', is a former Dewey in the foothills.

Aberystwyth (/ˌæbəˈrɪstwɪθ/; Welsh: [abɛˈrəstʊɨθ] ) is a university and seaside town and a community in Ceredigion, Wales. It is the largest town in Ceredigion and 16 miles (26 km) from Aberaeron, the county's other administrative centre. In 2021, the population of the town was 14,640.

Located in the historic county of Cardiganshire, Aberystwyth means "the mouth of the Ystwyth". It has been a major educational location in Wales since the establishment of University College Wales, now Aberystwyth University, in 1872.