# Delyn (Senedd constituency)

Delyn is a constituency of the Senedd. 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 was created for the first election to the Assembly, in 1999, with the name and boundaries of the Delyn Westminster constituency. It is entirely within the preserved county of Clwyd.
As created in 1999, the North Wales region included the constituencies of Alyn and Deeside, Caernarfon, Clwyd West, Clwyd South, Conwy, Delyn, Vale of Clwyd, Wrexham and Ynys Môn. From the 2007 election the region included Aberconwy, Alyn and Deeside, Arfon, Clwyd South, Clwyd West, Delyn, Vale of Clwyd, Wrexham and Ynys Môn.

## Voting

In elections for the Senedd, each voter has two votes. The first vote is for a candidate for the voter's constituency, elected by the first past the post system. The second vote is 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 |
| 1999 | Alison Halford | Labour |
| 2003 | Sandy Mewies | Labour |
| 2016 | Hannah Blythyn | Labour |

## Elections
### Elections in the 2020s

2021 Senedd election: Delyn :
| Party | Party | Candidate | Constituency | Constituency | Constituency | Regional | Regional | Regional |
| Party | Party | Candidate | Votes | % | ±% | Votes | % | ±% |
| | Labour | Hannah Blythyn | 12,846 | 48.6 | +7.7 | 10,423 | 39.6 | +5.0 |
| | Conservative | Mark Isherwood | 9,135 | 34.5 | +9.0 | 8,640 | 32.8 | +9.5 |
| | Plaid Cymru | Paul Rowlinson | 2,097 | 7.9 | -1.9 | 3,052 | 11.6 | ±0.0 |
| | Liberal Democrats | Andrew Parkhurst | 1,094 | 4.1 | -3.3 | 1,105 | 4.2 | -1.8 |
| | UKIP | Mary Davies | 862 | 3.3 | -13.1 | 548 | 2.1 | -12.6 |
| | Reform UK | Aiden Down | 297 | 1.1 | New | 264 | 1.0 | New |
| | Gwlad | Anthony Williams | 112 | 0.4 | New | 121 | 0.5 | New |
| | Abolish | Abolish | Abolish | Abolish | Abolish | 1,131 | 4.3 | -1.5 |
| | Green | Green | Green | Green | Green | 704 | 2.7 | +0.9 |
| | Freedom Alliance (UK) | Freedom Alliance (UK) | Freedom Alliance (UK) | Freedom Alliance (UK) | Freedom Alliance (UK) | 147 | 0.6 | New |
| | Communist | Communist | Communist | Communist | Communist | 60 | 0.2 | -0.1 |
| | Independent | Michelle Brown | Michelle Brown | Michelle Brown | Michelle Brown | 49 | 0.2 | New |
| | Propel | Propel | Propel | Propel | Propel | 45 | 0.2 | New |
| | TUSC | TUSC | TUSC | TUSC | TUSC | 25 | 0.1 | New |
| Majority | Majority | Majority | 3,711 | 14.1 | −1.3 |
| Turnout | Turnout | Turnout | 26,303 | 46.81 | +3.5 |
| | Labour hold | Labour hold | Swing | | |
| Notes ↑ Incumbent member for this constituency ↑ Incumbent member on the party list, or for another constituency |||||||||

### Elections in the 2010s

Welsh Assembly Election 2016: Delyn :
| Party | Party | Candidate | Constituency | Constituency | Constituency | Regional | Regional | Regional |
| Party | Party | Candidate | Votes | % | ±% | Votes | % | ±% |
| | Labour | Hannah Blythyn | 9,480 | 40.9 | −5.2 | 8,004 | 34.6 | -3.0 |
| | Conservative | Huw Williams | 5,898 | 25.5 | −8.2 | 5,399 | 23.3 | -6.2 |
| | UKIP | Nigel Williams | 3,794 | 16.4 | New | 3,403 | 14.7 | +9.3 |
| | Plaid Cymru | Paul Rowlinson | 2,269 | 9.8 | −2.8 | 2,681 | 11.6 | -1.6 |
| | Liberal Democrats | Tom Rippeth | 1,718 | 7.4 | −0.2 | 1,390 | 6.0 | -0.1 |
| | Abolish | Abolish | Abolish | Abolish | Abolish | 1,332 | 5.8 | New |
| | Green | Green | Green | Green | Green | 417 | 1.8 | -0.1 |
| | Association of Welsh Independents | Association of Welsh Independents | Association of Welsh Independents | Association of Welsh Independents | Association of Welsh Independents | 234 | 1.0 | New |
| | Monster Raving Loony | Monster Raving Loony | Monster Raving Loony | Monster Raving Loony | Monster Raving Loony | 148 | 0.6 | New |
| | Mark Young - Independent | Mark Young - Independent | Mark Young - Independent | Mark Young - Independent | Mark Young - Independent | 87 | 0.4 | New |
| | Communist | Communist | Communist | Communist | Communist | 63 | 0.3 | +0.1 |
| Majority | Majority | Majority | 3,582 | 15.4 | +3.0 |
| Turnout | Turnout | Turnout | 23,159 | 43.3 | +0.3 |
| | Labour hold | Labour hold | Swing | +1.5 | |
Welsh Assembly Election 2011: Delyn :
| Party | Party | Candidate | Constituency | Constituency | Constituency | Regional | Regional | Regional |
| Party | Party | Candidate | Votes | % | ±% | Votes | % | ±% |
| | Labour | Sandy Mewies | 10,695 | 46.1 | +11.5 | 8,690 | 37.6 | +6.7 |
| | Conservative | Matthew Wright | 7,814 | 33.7 | +1.4 | 6,819 | 29.5 | -0.4 |
| | Plaid Cymru | Carrie Harper | 2,918 | 12.6 | −2.1 | 3,044 | 13.2 | -5.5 |
| | Liberal Democrats | Michele Jones | 1,767 | 7.6 | −4.7 | 1,420 | 6.1 | +0.3 |
| | UKIP | UKIP | UKIP | UKIP | UKIP | 1,241 | 5.4 | +1.3 |
| | BNP | BNP | BNP | BNP | BNP | 579 | 2.5 | -3.2 |
| | Socialist Labour | Socialist Labour | Socialist Labour | Socialist Labour | Socialist Labour | 540 | 2.3 | +0.8 |
| | Green | Green | Green | Green | Green | 444 | 1.9 | -0.7 |
| | Welsh Christian | Welsh Christian | Welsh Christian | Welsh Christian | Welsh Christian | 203 | 0.9 | ±0.0 |
| | Weyman - Independent | Weyman - Independent | Weyman - Independent | Weyman - Independent | Weyman - Independent | 92 | 0.4 | New |
| | Communist | Communist | Communist | Communist | Communist | 56 | 0.2 | -0.3 |
| Majority | Majority | Majority | 2,881 | 12.4 | +10.1 |
| Turnout | Turnout | Turnout | 23,194 | 43.0 | +1.9 |
| | Labour hold | Labour hold | Swing | +5.1 | |
Regional ballots rejected: 254

### Elections in the 2000s

Welsh Assembly Election 2007: Delyn :
| Party | Party | Candidate | Constituency | Constituency | Constituency | Regional | Regional | Regional |
| Party | Party | Candidate | Votes | % | ±% | Votes | % | ±% |
| | Labour | Sandy Mewies | 7,507 | 34.6 | −4.0 | 6,470 | 29.9 | -6.7 |
| | Conservative | Antoinette Sandbach | 6,996 | 32.3 | +3.3 | 6,464 | 29.9 | +5.0 |
| | Plaid Cymru | Meg Elis | 3,179 | 14.7 | −0.7 | 4,049 | 18.7 | +3.6 |
| | Liberal Democrats | Ian Matthews | 2,669 | 12.3 | −4.7 | 1,245 | 5.8 | -6.9 |
| | UKIP | Derek Bigg | 1,318 | 6.1 | New | 877 | 4.1 | +1.5 |
| | BNP | BNP | BNP | BNP | BNP | 1,236 | 5.7 | New |
| | Green | Green | Green | Green | Green | 570 | 2.6 | -0.1 |
| | Socialist Labour | Socialist Labour | Socialist Labour | Socialist Labour | Socialist Labour | 326 | 1.5 | New |
| | Welsh Christian | Welsh Christian | Welsh Christian | Welsh Christian | Welsh Christian | 189 | 0.9 | New |
| | Communist | Communist | Communist | Communist | Communist | 116 | 0.5 | New |
| | CPA | CPA | CPA | CPA | CPA | 73 | 0.3 | New |
| Majority | Majority | Majority | 511 | 2.3 | −7.2 |
| Turnout | Turnout | Turnout | 21,669 | 41.1 | +10.1 |
| | Labour hold | Labour hold | Swing | −3.7 | |
Welsh Assembly Election 2003: Delyn :
| Party | Party | Candidate | Constituency | Constituency | Constituency | Regional | Regional | Regional |
| Party | Party | Candidate | Votes | % | ±% | Votes | % | ±% |
| | Labour | Sandy Mewies | 6,520 | 38.6 | −6.1 | 6,184 | 36.6 | |
| | Conservative | Mark Isherwood | 4,896 | 29.0 | +7.0 | 4,207 | 24.9 | |
| | Liberal Democrats | David P. Lloyd | 2,880 | 17.1 | +4.1 | 2,151 | 12.7 | |
| | Plaid Cymru | Paul J. Rowlinson | 2,588 | 15.3 | −5.0 | 2,549 | 15.1 | |
| | John Marek Independent Party | John Marek Independent Party | John Marek Independent Party | John Marek Independent Party | John Marek Independent Party | 661 | 3.9 | |
| | Green | Green | Green | Green | Green | 464 | 2.7 | |
| | UKIP | UKIP | UKIP | UKIP | UKIP | 445 | 2.6 | |
| | ProLife Alliance | ProLife Alliance | ProLife Alliance | ProLife Alliance | ProLife Alliance | 93 | 0.6 | |
| | Cymru Annibynnol | Cymru Annibynnol | Cymru Annibynnol | Cymru Annibynnol | Cymru Annibynnol | 85 | 0.5 | |
| | Communist | Communist | Communist | Communist | Communist | 59 | 0.3 | |
| Majority | Majority | Majority | 1,624 | 9.6 | −13.1 |
| Turnout | Turnout | Turnout | 17,073 | 31.4 | −12.8 |
| | Labour hold | Labour hold | Swing | −6.6 | |
2003 Electorate: 54,426 Regional ballots rejected: 203

### Elections in the 1990s

Welsh Assembly Election 1999: Delyn :
| Party | Party | Candidate | Constituency | Constituency | Constituency | Regional | Regional | Regional |
| Party | Party | Candidate | Votes | % | ±% | Votes | % | ±% |
| | Labour | Alison Halford | 10,672 | 44.7 | N/A | 9,909 | 41.6 | N/A |
| | Conservative | Karen Lumley | 5,255 | 22.0 | N/A | 5,000 | 21.0 | N/A |
| | Plaid Cymru | Meg Elis | 4,837 | 20.3 | N/A | 4,955 | 20.8 | N/A |
| | Liberal Democrats | Eleanor Burnham | 3,089 | 13.0 | N/A | 3,091 | 13.0 | N/A |
| | Green | Green | Green | Green | Green | Unknown | Unknown | N/A |
| | Rhuddlan Debt Protest Campaign | Rhuddlan Debt Protest Campaign | Rhuddlan Debt Protest Campaign | Rhuddlan Debt Protest Campaign | Rhuddlan Debt Protest Campaign | Unknown | Unknown | N/A |
| | United Socialist | United Socialist | United Socialist | United Socialist | United Socialist | Unknown | Unknown | N/A |
| | Communist | Communist | Communist | Communist | Communist | Unknown | Unknown | N/A |
| | Natural Law | Natural Law | Natural Law | Natural Law | Natural Law | Unknown | Unknown | N/A |
| | Above list parties | Above list parties | Above list parties | Above list parties | Above list parties | 842 | 3.5 | N/A |
| Majority | Majority | Majority | 5,417 | 22.7 | N/A |
| Turnout | Turnout | Turnout | 23,853 | 44.2 | N/A |
| | Labour win (new seat) | Labour win (new seat) | Labour win (new seat) | Labour win (new seat) | Labour win (new seat) |