List of Welsh principal areas by highest point
This is a list of the principal areas of Wales, ordered by their highest points.
| Rank | Unitary authority | Peak | Height
| Grid reference |
| 1 | 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 | c.595 | |
| 11 | Blaenau Gwent | Coity Mountain | 581 | |
| 12 | Torfaen | Coity Mountain | c. 580 | |
| 13 | Bridgend | Mynydd Llangeinwyr | 568 | |
| 14 | Flintshire | Moel Famau | 554 | |
| 15 | Pembrokeshire | Foel Cwmcerwyn | 536 | |
| 16 | Caerphilly | Twyn Pwll Morlais | c. 535 | |
| 17 | Merthyr Tydfil | Waun Llysiog | c. 515 | |
| 18 | Swansea | Mynydd y Betws | 374 | |
| 19 | Newport | Wentwood | 309 | |
| 20 | Cardiff | Garth Hill | 307 | |
| 21 | Isle of Anglesey | Holyhead Mountain | 220 | |
| 22 | Vale of Glamorgan | Pantylladron | 137 | |
