List of counties of Wales by area in 1831

This is a list of the historic counties of Wales as recorded by the 1831 census, ordered by their area.

RankCountyArea (acres)1 Carmarthenshire 606,331 2 Glamorgan 547,494 3 Montgomeryshire 483,323 4 Brecknockshire 460,158 5 Cardiganshire 443,3876 Pembrokeshire 401,6917 Denbighshire 386,052 8 Merionethshire 385,2919 Caernarfonshire 370,27310 Monmouthshire 324,310 11 Radnorshire 272,12812 Anglesey 193,45313 Flintshire 184,905

References 1831 census