Carmarthen West & Pembrokeshire South| Nicholas Ainger | Labour | 15,349 | 41.6% |
| Robert Wilson | Conservative | 10,811 | 29.3% |
| Llyr Griffiths | Plaid Cymru | 6,893 | 18.7% |
| William Jeremy | LibDem | 3,248 | 8.8% |
| Ian Phillips | UKIP | 537 | 1.5% |
| Nick Turner | Direct Customer | 78 | 0.2% |
Electorate 56,518; Turnout 65.3%; Majority 4,538 (12.3%)
Swing: 5.1% to Con from Lab; Declared: 3.23am
| N Ainger | Labour | 20,956 | 49.15% |
| O Williams | Conservative | 11,335 | 26.58% |
| D Llewellyn | Plaid Cymru | 5,402 | 12.67% |
| K Evans | LibDem | 3,516 | 8.25% |
| J Poirrier | Referendum | 1,432 | 3.36% |
Electorate: 55,724; Turnout: 76.52%; Lab majority 9,621 (22.56%)
Swing from Con to Lab of 9.80%