List of counties of Wales by population in 1971
# List of counties of Wales by population in 1971

This is a list of historic counties of Wales, ordered by population as at the 1971 census.

| Rank | County | Total population |
| - | - | - |
| 1 | Glamorgan | 1,258,738 |
| 2 | Monmouthshire | 462,172 |
| 3 | Denbighshire | 185,193 |
| 4 | Flintshire | 175,769 |
| 5 | Carmarthenshire | 162,568 |
| 6 | Caernarvonshire | 123,065 |
| 7 | Pembrokeshire | 98,973 |
| 8 | Anglesey | 59,756 |
| 9 | Cardiganshire | 54,877 |
| 10 | Breconshire | 53,381 |
| 11 | Montgomeryshire | 43,131 |
| 12 | Merionethshire | 35,329 |
| 13 | Radnorshire | 18,277 |
