# Dwyfor Meirionnydd (UK Parliament constituency)

Dwyfor Meirionnydd is a constituency of the House of Commons of the Parliament of the United Kingdom (at Westminster), represented since 2017 by Liz Saville Roberts of Plaid Cymru.
Like its predecessors, it is a Plaid Cymru stronghold, with their candidate in 2024 achieving a majority of 39.3%.
Until 2024, the seat shared the same boundaries with the Dwyfor Meirionnydd Welsh Assembly constituency, the latter of which still uses the borders established for the 2007 Welsh Assembly election.

## History

Dwyfor Meirionnydd was created by the Welsh Boundary Commission for the 2010 general election, and replaced the old north Wales seat of Meirionnydd Nant Conwy.
At the 2023 Periodic Review of Westminster constituencies and under the June 2023 final recommendations of the Boundary Commission for Wales, the constituency retained its name and gained wards in boundary changes first used for the 2024 United Kingdom general election.

## Boundaries

The constituency was created by merging most of Meirionnydd Nant Conwy with the southern part of Caernarfon; the northern area became part of a new Arfon constituency.
2010–2024: The County of Gwynedd wards of: Aberdaron, Aberdyfi, Abererch, Abermaw, Abersoch, Bala, Botwnnog, Bowydd and Rhiw, Brithdir and Llanfachreth/Ganllwyd/Llanelltyd, Bryn-crug/Llanfihangel, Clynnog, Corris/Mawddwy, Criccieth, Diffwys and Maenofferen, Dolbenmaen, Dolgellau North, Dolgellau South, Dyffryn Ardudwy, Efail-newydd/Buan, Harlech, Llanaelhaearn, Llanbedr, Llanbedrog, Llandderfel, Llanengan, Llangelynin, Llanuwchllyn, Llanystumdwy, Morfa Nefyn, Nefyn, Penrhyndeudraeth, Porthmadog East, Porthmadog West, Porthmadog-Tremadog, Pwllheli North, Pwllheli South, Teigl, Trawsfynydd, Tudweiliog and Tywyn.
2024–present: Under the 2023 review, drawn up in accordance with the ward structure in existence on 1 December 2020, the constituency was defined as comprising the wards above, plus the Gwynedd wards of Bethel, Bontnewydd, CadnantCwm-y-Glo, Deiniolen, Groeslon, Llanberis, Llanllyfni, Llanrug, Llanwnda, Menai (Caernarfon), Peblig (Caernarfon), Penisarwaun, Pentir, Penygroes, Seiont, Talysarn, Waunfawr, and Y Felinheli; and the County of Denbighshire wards of Corwen and Llandrillo.
    The areas in Gwynedd were transferred in from the abolished Arfon constituency, and the areas in Denbighshire from the abolished Clwyd South constituency.
Following local government boundary reviews which came into effect in May 2022, the constituency now comprises the following from the 2024 general election:
* The County of Gwynedd wards of: Aberdyfi; Abererch; Abermaw; Abersoch gyda Llanengan; Arthog a Llangelynnin; Bethel a’r Felinheli; Bowydd a’r Rhiw; Brithdir and Llanfachreth/Ganllwyd/Llanelltyd; Bro Dysynni; Cadnant; Canol Tref Caernarfon; Clynnog; Corris a Mawddwy; Criccieth; Cwm-y-glo; De Dolgellau; De Pwllheli; Deiniolen; Diffwys a Maenofferen; Dolbenmaen; Dwyrain Porthmadog; Dyffryn Ardudwy; Efailnewydd a Buan; Glaslyn; Gogledd Dolgellau; Gogledd Pwllheli; Gorllewin Porthmadog; Gorllewin Tywyn; Harlech a Llanbedr; Hendre; Llanbedrog gyda Mynytho; Llanberis; Llandderfel; Llanllyfni; Llanrug; Llanuwchllyn; Llanwnda; Llanystumdwy; Menai; Morfa Nefyn a Thudweiliog; Morfa Tywyn; Nefyn; Peblig; Pen draw Llŷn; Penisa’r-waun; Penrhyndeudraeth; Pen-y-groes; Teigl; Trawsfynydd; Tryfan; Waunfawr; Y Bala; Y Bontnewydd; Y Groeslon; Yr Eifl.
* The County of Denbighshire ward of Edeirnion.
The seat is bordered to the north by Bangor Aberconwy, to the south by Montgomeryshire and Glyndŵr, and to the east by Clwyd East.

## Members of Parliament

| Election | Election | Member | Party | Notes |
| | 2010 | Elfyn Llwyd | Plaid Cymru | Plaid Cymru's Westminster parliamentary group leader until 2015 |
| | 2015 | Liz Saville Roberts | Plaid Cymru | Plaid Cymru's Westminster parliamentary group leader from 2017 |

## Elections
### Elections in the 2010s

General election 2010: Dwyfor Meirionnydd :
| Party | Party | Candidate | Votes | % | ±% |
| | Plaid Cymru | Elfyn Llwyd | 12,814 | 44.3 | N/A |
| | Conservative | Simon Baynes | 6,447 | 22.3 | N/A |
| | Labour | Alwyn Humphreys | 4,021 | 13.9 | N/A |
| | Liberal Democrats | Stephen Churchman | 3,538 | 12.2 | N/A |
| | Independent | Louise Hughes | 1,310 | 4.5 | N/A |
| | UKIP | Frank Wykes | 776 | 2.7 | N/A |
| Majority | Majority | Majority | 6,367 | 22.0 | N/A |
| Turnout | Turnout | Turnout | 28,906 | 63.7 | N/A |
| Registered electors | Registered electors | Registered electors | 45,354 | | |
| | Plaid Cymru win (new seat) | Plaid Cymru win (new seat) | Plaid Cymru win (new seat) | Plaid Cymru win (new seat) | Plaid Cymru win (new seat) |
General election 2015: Dwyfor Meirionnydd :
| Party | Party | Candidate | Votes | % | ±% |
| | Plaid Cymru | Liz Saville Roberts | 11,811 | 40.9 | −3.4 |
| | Conservative | Neil Fairlamb | 6,550 | 22.7 | +0.4 |
| | Labour | Mary Clarke | 3,904 | 13.5 | −0.4 |
| | UKIP | Christopher Gillibrand | 3,126 | 10.8 | +8.1 |
| | Independent | Louise Hughes | 1,388 | 4.8 | +0.3 |
| | Liberal Democrats | Stephen Churchman | 1,153 | 4.0 | −8.2 |
| | Green | Marc Fothergill | 981 | 3.4 | N/A |
| Majority | Majority | Majority | 5,261 | 18.2 | −3.8 |
| Turnout | Turnout | Turnout | 28,913 | 65.1 | +1.4 |
| Registered electors | Registered electors | Registered electors | 44,394 | | |
| | Plaid Cymru hold | Plaid Cymru hold | Swing | −1.9 | |
General election 2017: Dwyfor Meirionnydd :
| Party | Party | Candidate | Votes | % | ±% |
| | Plaid Cymru | Liz Saville Roberts | 13,687 | 45.1 | +4.2 |
| | Conservative | Neil Fairlamb | 8,837 | 29.1 | +6.4 |
| | Labour | Mathew Norman | 6,273 | 20.7 | +7.2 |
| | Liberal Democrats | Stephen Churchman | 937 | 3.1 | −0.9 |
| | UKIP | Frank Wykes | 614 | 2.0 | −8.8 |
| Majority | Majority | Majority | 4,850 | 16.0 | −2.2 |
| Turnout | Turnout | Turnout | 30,312 | 68.0 | +2.9 |
| Registered electors | Registered electors | Registered electors | 44,699 | | |
| | Plaid Cymru hold | Plaid Cymru hold | Swing | −1.1 | |
General election 2019: Dwyfor Meirionnydd :
| Party | Party | Candidate | Votes | % | ±% |
| | Plaid Cymru | Liz Saville Roberts | 14,447 | 48.3 | +3.2 |
| | Conservative | Tomos Davies | 9,707 | 32.4 | +3.3 |
| | Labour | Graham Hogg | 3,998 | 13.4 | −7.3 |
| | Brexit Party | Louise Hughes | 1,776 | 5.9 | N/A |
| Majority | Majority | Majority | 4,740 | 15.9 | −0.1 |
| Turnout | Turnout | Turnout | 29,928 | 67.5 | −0.5 |
| Registered electors | Registered electors | Registered electors | 44,362 | | |
| | Plaid Cymru hold | Plaid Cymru hold | Swing | −0.1 | |

### Elections in the 2020s

General election 2024: Dwyfor Meirionnydd :
| Party | Party | Candidate | Votes | % | ±% |
| | Plaid Cymru | Liz Saville Roberts | 21,788 | 53.9 | +8.2 |
| | Labour | Joanna Stallard | 5,912 | 14.6 | −8.2 |
| | Reform UK | Lucy Murphy | 4,857 | 12.0 | +6.9 |
| | Conservative | Tomos Day | 4,712 | 11.7 | −14.5 |
| | Green | Karl Drinkwater | 1,448 | 3.6 | +3.6 |
| | Liberal Democrats | Phoebe Jenkins | 1,381 | 3.4 | +3.2 |
| | Heritage | Joan Ginsberg | 297 | 0.7 | +0.7 |
| Majority | Majority | Majority | 15,876 | 39.3 | +23.4 |
| Turnout | Turnout | Turnout | 40,395 | 55.3 | −14.3 |
| Registered electors | Registered electors | Registered electors | 73,042 | | |
| | Plaid Cymru hold | Plaid Cymru hold | Swing | +8.2 | |