This is a list of the principal areas of Wales, ordered by their highest points.
Rank Principal area Peak Height(metres) Grid reference1 Gwynedd Snowdon 1085 2 Conwy Carnedd Llewelyn 1064 3 Powys Pen y Fan 886 4 Denbighshire Cadair Berwyn 830 5 Wrexham Craig Berwyn 790 6 Carmarthenshire Fan Foel 781 7 Ceredigion Plynlimon 752 8 Monmouthshire Chwarel y Fan 679 9 Neath Port Talbot Craig y Llyn 600 10 Rhondda Cynon Taf Craig y Llyn (eastern slopes) c. 589 11 Blaenau Gwent Coity Mountain 581 12 Torfaen Coity Mountain (north-eastern slopes) c. 580 13 Bridgend Mynydd Llangeinwyr 568 14 Flintshire Moel Famau 554 15 Pembrokeshire Foel Cwmcerwyn 536 16 Caerphilly Twyn Pwll Morlais (SE slopes) c. 535 17 Merthyr Tydfil Twyn Pwll Morlais (southern slopes) c. 531 18 Swansea Mynydd y Gwair 374 19 Newport Wentwood 309 20 Cardiff Garth Hill 307 21 Isle of Anglesey Holyhead Mountain 220 22 Vale of Glamorgan Unnamed hill SE of Pantylladron 137
Notes The highest points in the principal areas of both Torfaen and Rhondda Cynon Taf are not summits but locations high on hills, the summits of which are just west of the boundary in neighbouring principal areas. The highest points of the principal areas of Merthyr Tydfil and Caerphilly are not summits either but two locations near to each other on the southern slopes of a higher hill, Cefn yr Ystrad whose summit lies in the adjacent area of Powys.
References
Ordnance Survey 1:25,000 scale map data Hill-bagging website - database of British and Irish hills