Ynys Môn (Assembly constituency)
National Assembly for Wales
Ynys Môn shown within the
North Wales electoral region and the region shown within Wales
Ynys Môn (Anglesey) is a constituency of the National Assembly for Wales. It elects one Assembly Member 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.
It has been represented since 1999 by Ieuan Wyn Jones, the former leader of Plaid Cymru. Jones resigned from the Assembly on 20 June 2013, leaving the seat vacant and triggering a by-election in the constituency which was held on 1 August 2013. Plaid Cymru's candidate Rhun ap Iorwerth comfortably held the seat for the party with a majority of over 9000 votes. 
The constituency was created for the first election to the Assembly, in 1999, with the name and boundaries of the Ynys Môn Westminster constituency. It is entirely within the preserved county of Gwynedd.
As created in 1999, the North Wales region includes the constituencies of Alyn and Deeside, Caernarfon, Clwyd West, Clwyd South, Conwy, Delyn, Vale of Clwyd, Wrexham and Ynys Môn. From the 2007 Assembly election the region included Aberconwy, Alyn and Deeside, Arfon, Clwyd South, Clwyd West, Delyn, Vale of Clwyd, Wrexham and Ynys Môn.
In elections for the National Assembly for Wales, each voter has two votes. The first vote may be used to vote for a candidate to become the Assembly Member 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.
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Elections in the 2010s
|Ynys Môn by-election, 2013|
|Plaid Cymru||Rhun ap Iorwerth||12,601||58.24||+16.8|
|Socialist Labour||Kathrine Jones||348||1.61||N/A|
|Liberal Democrat||Stephen William Churchman||309||1.43||−1.8|
|Welsh Assembly Election 2011: Ynys Môn|
|Plaid Cymru||Ieuan Wyn Jones||9,969||41.4||+1.7|
|Liberal Democrats||Rhys Taylor||759||3.2||−0.2|
|Plaid Cymru hold||Swing||−7.3|
Elections in the 2000s
|Welsh Assembly Election 2007: Ynys Môn|
|Plaid Cymru||Ieuan Wyn Jones||10,653||39.7||+2.3|
|Labour||Jonathan Edward N. Austin||4,681||17.4||−6.4|
|Conservative||James Paul Robert Roach||3,480||13.0||−15.5|
|Liberal Democrats||Mrs. Mandi L. Abrahams||912||3.4||−4.9|
|UKIP||Francis C. Wykes||833||3.1||+2.2|
|Plaid Cymru hold||Swing|
|Welsh Assembly Election 2003: Ynys Môn|
|Plaid Cymru||Ieuan Wyn Jones||9,452||37.4||−15.2|
|Labour||William G. Jones||6,024||23.8||+0.9|
|Liberal Democrats||Nicholas Bennett||2,089||8.2||+3.0|
|Plaid Cymru hold||Swing|
Elections in the 1990s
|Welsh Assembly Election 1999: Ynys Môn|
|Plaid Cymru||Ieuan Wyn Jones||16,469||52.6||N/A|
|Liberal Democrats||James H. Clarke||1,630||5.2||N/A|
|Plaid Cymru win (new seat)|
- North Wales (National Assembly for Wales electoral region)
- National Assembly for Wales constituencies and electoral regions
- "Ynys Mon by-election set for 1 August". BBC News. 26 June 2013. Retrieved 29 June 2013.
- "Wales elections". BBC News. BBC. 6 May 2011. Retrieved 6 May 2011.
- "Welsh assembly election 2007". BBC News. British Broadcasting Corporation. 2007-05-07. Retrieved 2008-07-15.