This is a list of the historic counties of Wales as recorded by the 1831 census, ordered by their area.
| Rank |
County |
Area (acres)
|
| 1 |
Carmarthenshire |
606,331
|
| 2 |
Glamorgan |
547,494
|
| 3 |
Montgomeryshire |
483,323
|
| 4 |
Brecknockshire |
460,158
|
| 5 |
Cardiganshire |
443,387
|
| 6 |
Pembrokeshire |
401,691
|
| 7 |
Denbighshire |
386,052
|
| 8 |
Merionethshire |
385,291
|
| 9 |
Caernarfonshire |
370,273
|
| 10 |
Monmouthshire |
324,310
|
| 11 |
Radnorshire |
272,128
|
| 12 |
Anglesey |
193,453
|
| 13 |
Flintshire |
184,905
|
References
