Alyn and Deeside ( cy, Alun a Glannau Dyfrdwy) is a constituency of the Senedd. It elects one Member of the Senedd by the

first past the post In a first-past-the-post electoral system (FPTP or FPP), formally called single-member plurality voting (SMP) when used in single-member districts or informally choose-one voting in contrast to ranked voting, or score voting, voters cast thei ...

method of election. Also, however, it is one of nine constituencies in the

North Wales North Wales ( cy, Gogledd Cymru) is a region of Wales, encompassing its northernmost areas. It borders Mid Wales to the south, England to the east, and the Irish Sea to the north and west. The area is highly mountainous and rural, with Snowdonia N ...

electoral region, which elects four additional members, in addition to nine constituency members, to produce a degree of

proportional representation Proportional representation (PR) refers to a type of electoral system under which subgroups of an electorate are reflected proportionately in the elected body. The concept applies mainly to geographical (e.g. states, regions) and political divis ...

for the region as a whole. The constituency has been represented by Jack Sargeant since February 2018.

Boundaries

The constituency was created for the first election to the Assembly, in 1999, with the name and boundaries of the Alyn and Deeside Westminster constituency. It is entirely within the

preserved county The preserved counties of Wales are the eight current areas used in Wales for the ceremonial purposes of lieutenancy and shrievalty. They are based on the counties created by the Local Government Act 1972 and used for local government and othe ...

of Clwyd. For the 2007 Assembly election, there were minor changes to the constituency's boundaries. For Westminster purposes, the same boundary changes became effective at the 2010 United Kingdom general election. When created in 1999, the North Wales region included the constituencies of Alyn and Deeside,

Caernarfon Caernarfon (; ) is a royal town, community and port in Gwynedd, Wales, with a population of 9,852 (with Caeathro). It lies along the A487 road, on the eastern shore of the Menai Strait, opposite the Isle of Anglesey. The city of Bangor is ...

, Clwyd West, Clwyd South,

Conwy Conwy (, ), previously known in English as Conway, is a walled market town, community and the administrative centre of Conwy County Borough in North Wales. The walled town and castle stand on the west bank of the River Conwy, facing Deganwy on ...

, Delyn,

Vale of Clwyd The Vale of Clwyd ( cy, Dyffryn Clwyd) is a tract of low-lying ground in the county of Denbighshire in north-east Wales. The Vale extends south-southwestwards from the coast of the Irish Sea for some 20 miles (about 30 km) forming a triangl ...

Wrexham Wrexham ( ; cy, Wrecsam; ) is a city and the administrative centre of Wrexham County Borough in Wales. It is located between the Welsh mountains and the lower Dee Valley, near the border with Cheshire in England. Historically in the count ...

and Ynys Môn (

Anglesey Anglesey (; cy, (Ynys) Môn ) is an island off the north-west coast of Wales. It forms a principal area known as the Isle of Anglesey, that includes Holy Island across the narrow Cymyran Strait and some islets and skerries. Anglesey island ...

). Since the 2007 election, the region includes Aberconwy, Alyn and Deeside, Arfon, Clwyd South, Clwyd West, Delyn,

and Ynys Môn (

History

The constituency has been held by Labour since its creation. The assembly member Carl Sargeant served as Cabinet Secretary for Communities and Children from 19 May 2016 until his resignation on 3 November 2017 following his suspension from the Labour Party due to "shocking and distressing" allegations about his personal behaviour. The seat was vacant following his death by suicide on 7 November 2017 and remained vacant until the by-election in the constituency took place on 6 February 2018, which was won by Carl's son Jack Sargeant for the Labour Party.

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 Closed list describes the variant of party-list systems where voters can effectively only vote for political parties as a whole; thus they have no influence on the party-supplied order in which party candidates are elected. If voters had some in ...

of candidates. Additional member seats are allocated from the lists by the

d'Hondt method The D'Hondt method, also called the Jefferson method or the greatest divisors method, is a method for allocating seats in parliaments among federal states, or in party-list proportional representation systems. It belongs to the class of highest ...

, with constituency results being taken into account in the allocation.

Assembly Members and Members of the Senedd

Elections

Elections in the 2020s

Elections in the 2010s

by-election A by-election, also known as a special election in the United States and the Philippines, a bye-election in Ireland, a bypoll in India, or a Zimni election (Urdu: ضمنی انتخاب, supplementary election) in Pakistan, is an election used to f ...

took place on 6 February 2018, following the death of incumbent AM Carl Sargeant. Regional ballots rejected: 226

Elections in the 2000s

2003 Electorate: 60,518
Regional ballots rejected: 120