# Arfon (Senedd constituency)

Arfon is a constituency of the Senedd. It was created for the former Assembly's 2007 election. It elects one Member of the Senedd by the first past the post method of election. Also, however, it is one of nine constituencies in the North Wales electoral region, which elects four additional members, in addition to nine constituency members, to produce a degree of proportional representation for the region as a whole.

## Boundaries

The constituency had the boundaries of the Arfon Westminster constituency, entirely within the preserved county of Gwynedd, which came into use, also, for the 2010 United Kingdom general election. The new constituency merged areas currently within the Caernarfon constituency and the Conwy constituency. The Caernarfon constituency was entirely within the preserved county of Gwynedd. The Conwy constituency was partly a Gwynedd constituency and partly within the preserved county of Clwyd.
The North Wales region was created for the first Assembly election, in 1999. For the 2007 election, however, it had new boundaries. It includes the constituencies of Aberconwy, Alyn and Deeside, Arfon, Clwyd South, Clwyd West, Delyn, Vale of Clwyd, Wrexham and Ynys Môn.

## Voting

In general elections for the Senedd, each voter has two votes. The first vote may be used to vote for a candidate to become the Member of the Senedd for the voter's constituency, elected by the first past the post system. The second vote may be used to vote for a regional closed party list of candidates. Additional member seats are allocated from the lists by the d'Hondt method, with constituency results being taken into account in the allocation.

## Assembly Members and Members of the Senedd

| Election | Member | Party | Portrait |
| 2007 | constituency created; see Caernarfon and Conwy | constituency created; see Caernarfon and Conwy | constituency created; see Caernarfon and Conwy |
| 2007 | Alun Ffred Jones | Plaid Cymru | |
| 2016 | Siân Gwenllian | Plaid Cymru | |

## Elections
### Elections in the 2020s

2021 Senedd election: Arfon :
| Party | Party | Candidate | Constituency | Constituency | Constituency | Regional | Regional | Regional |
| Party | Party | Candidate | Votes | % | ±% | Votes | % | ±% |
| | Plaid Cymru | Siân Gwenllian | 13,760 | 63.3 | +8.5 | 11,955 | 55.7 | +5.4 |
| | Labour | Iwan Wyn Jones | 5,108 | 23.5 | -10.5 | 5,254 | 24.5 | +0.3 |
| | Conservative | Tony Thomas | 1,806 | 8.3 | ±0.0 | 1,925 | 9.0 | +2.1 |
| | Liberal Democrats | Calum Davies | 642 | 3.0 | +0.1 | 448 | 2.1 | -0.8 |
| | Reform UK | Andrew Haigh | 350 | 1.6 | New | 188 | 0.9 | New |
| | Independent | Martin Bristow | 82 | 0.4 | New |
| | Green | Green | Green | Green | Green | 865 | 4.0 | +0.5 |
| | Abolish | Abolish | Abolish | Abolish | Abolish | 403 | 1.9 | -1.6 |
| | Gwlad | Gwlad | Gwlad | Gwlad | Gwlad | 227 | 1.1 | New |
| | Freedom Alliance (UK) | Freedom Alliance (UK) | Freedom Alliance (UK) | Freedom Alliance (UK) | Freedom Alliance (UK) | 72 | 0.3 | New |
| | Communist | Communist | Communist | Communist | Communist | 63 | 0.3 | ±0.0 |
| | Propel | Propel | Propel | Propel | Propel | 42 | 0.2 | New |
| | Independent | Michelle Brown | Michelle Brown | Michelle Brown | Michelle Brown | 14 | 0.1 | New |
| | TUSC | TUSC | TUSC | TUSC | TUSC | 13 | 0.1 | New |
| Majority | Majority | Majority | 8,652 | 39.8 | +19.0 |
| Turnout | Turnout | Turnout | 21,478 | 50.92 | 0.0 |
| | Plaid Cymru hold | Plaid Cymru hold | Swing | | |
| Notes ↑ Incumbent member for this constituency |||||||||

### Elections in the 2010s

Welsh Assembly Election 2016: Arfon :
| Party | Party | Candidate | Constituency | Constituency | Constituency | Regional | Regional | Regional |
| Party | Party | Candidate | Votes | % | ±% | Votes | % | ±% |
| | Plaid Cymru | Siân Gwenllian | 10,962 | 54.8 | -1.9 | 10,028 | 50.3 | +2.8 |
| | Labour | Sion Jones | 6,800 | 34.0 | +7.8 | 4,831 | 24.2 | -0.3 |
| | Conservative | Martin Peet | 1,655 | 8.3 | -4.2 | 1,369 | 6.9 | -4.4 |
| | Liberal Democrats | Sara Lloyd Williams | 577 | 2.9 | -1.6 | 582 | 2.9 | -0.8 |
| | UKIP | UKIP | UKIP | UKIP | UKIP | 1,376 | 6.9 | +4.0 |
| | Green | Green | Green | Green | Green | 706 | 3.5 | -0.9 |
| | Abolish | Abolish | Abolish | Abolish | Abolish | 696 | 3.5 | New |
| | Monster Raving Loony | Monster Raving Loony | Monster Raving Loony | Monster Raving Loony | Monster Raving Loony | 160 | 0.8 | New |
| | Association of Welsh Independents | Association of Welsh Independents | Association of Welsh Independents | Association of Welsh Independents | Association of Welsh Independents | 94 | 0.5 | New |
| | Communist | Communist | Communist | Communist | Communist | 61 | 0.3 | -0.2 |
| | Mark Young - Independent | Mark Young - Independent | Mark Young - Independent | Mark Young - Independent | Mark Young - Independent | 45 | 0.2 | New |
| Majority | Majority | Majority | 4,162 | 20.8 | −9.7 |
| Turnout | Turnout | Turnout | 19,994 | 50.9 | +7.5 |
| | Plaid Cymru hold | Plaid Cymru hold | Swing | -4.9 | |
Welsh Assembly Election 2011: Arfon :
| Party | Party | Candidate | Constituency | Constituency | Constituency | Regional | Regional | Regional |
| Party | Party | Candidate | Votes | % | ±% | Votes | % | ±% |
| | Plaid Cymru | Alun Ffred Jones | 10,024 | 56.7 | +4.3 | 8,402 | 47.5 | -6.6 |
| | Labour | Christina Rees | 4,630 | 26.2 | -0.6 | 4,327 | 24.5 | +1.2 |
| | Conservative | Aled Davies | 2,209 | 12.5 | +3.0 | 1,994 | 11.3 | +1.6 |
| | Liberal Democrats | Rhys Jones | 801 | 4.5 | -2.8 | 653 | 3.7 | -1.7 |
| | Green | Green | Green | Green | Green | 787 | 4.4 | +0.3 |
| | UKIP | UKIP | UKIP | UKIP | UKIP | 516 | 2.9 | +0.6 |
| | Socialist Labour | Socialist Labour | Socialist Labour | Socialist Labour | Socialist Labour | 480 | 2.7 | +2.2 |
| | BNP | BNP | BNP | BNP | BNP | 283 | 1.6 | -0.8 |
| | Welsh Christian | Welsh Christian | Welsh Christian | Welsh Christian | Welsh Christian | 103 | 0.6 | -+0.2 |
| | Communist | Communist | Communist | Communist | Communist | 85 | 0.5 | ±0.0 |
| | Weyman - Independent | Weyman - Independent | Weyman - Independent | Weyman - Independent | Weyman - Independent | 59 | 0.3 | New |
| Majority | Majority | Majority | 5,394 | 30.5 | +4.9 |
| Turnout | Turnout | Turnout | 17,664 | 43.4 | −5.7 |
| | Plaid Cymru hold | Plaid Cymru hold | Swing | +2.4 | |
Regional ballots rejected: 139

### Elections in the 2000s

Welsh Assembly Election 2007: Arfon :
| Party | Party | Candidate | Constituency | Constituency | Constituency | Regional | Regional | Regional |
| Party | Party | Candidate | Votes | % | ±% | Votes | % | ±% |
| | Plaid Cymru | Alun Ffred Jones | 10,260 | 52.4 | N/A | 10,042 | 54.1 | N/A |
| | Labour | Martin Eaglestone | 5,242 | 26.8 | N/A | 4,547 | 23.3 | N/A |
| | Conservative | Gerry Frobisher | 1,858 | 9.5 | N/A | 1,899 | 9.7 | N/A |
| | Liberal Democrats | Mel ab Owain | 1,424 | 7.3 | N/A | 1,054 | 5.4 | N/A |
| | UKIP | Elwyn Williams | 789 | 4.0 | N/A | 451 | 2.3 | N/A |
| | Green | Green | Green | Green | Green | 791 | 4.1 | N/A |
| | BNP | BNP | BNP | BNP | BNP | 460 | 2.4 | New |
| | Socialist Labour | Socialist Labour | Socialist Labour | Socialist Labour | Socialist Labour | 93 | 0.5 | N/A |
| | Communist | Communist | Communist | Communist | Communist | 88 | 0.5 | N/A |
| | Welsh Christian | Welsh Christian | Welsh Christian | Welsh Christian | Welsh Christian | 86 | 0.4 | N/A |
| | CPA | CPA | CPA | CPA | CPA | 11 | 0.1 | N/A |
| Majority | Majority | Majority | 5,018 | 25.6 | N/A |
| Turnout | Turnout | Turnout | 19,573 | 49.1 | N/A |
| | 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) |