Boundary set for Wales (13 April 2010 - 30 May 2024) General election party performance
Constituencies won
| Parties | 6 May 2010 | 7 May 2015 | 8 June 2017 | 12 December 2019 |
| Conservative | 8 | 11 | 8 | 14 |
| Green Party | 0 | 0 | 0 | 0 |
| Labour | 26 | 25 | 28 | 22 |
| Liberal Democrat | 3 | 1 | 0 | 0 |
| Plaid Cymru | 3 | 3 | 4 | 4 |
| UK Independence Party | 0 | 0 | 0 | 0 |