Референдум о вступлении в силу "Уэльского акта" 1978 г.
| Регион | ДА | % ДА | НЕТ | % НЕТ |
| Gwent | 21,369 | 12.09% | 155,389 | 87.91% |
| South Glamorgan(De Morgannwg) | 21,830 | 13.15% | 144,186 | 86.85% |
| Pows | 9,843 | 18.45% | 43,502 | 81.55% |
| West Glamorgan(Gorllewn Morgannwg) | 29,663 | 18.72% | 128,834 | 81.28% |
| Mid Glamorgan(Morgannwg Ganol) | 46,747 | 20.24% | 184,196 | 79.76% |
| Clwyd | 31,384 | 21.57% | 114,119 | 78.43% |
| Dyffed | 44,849 | 28.06% | 114,947 | 71.93% |
| Gwnedd | 37,363 | 34.43% | 71,157 | 65.57% |
| Уэльс | 243,048 | 20.26% | 956,330 | 79.74% |
