Cynon Valley (Senedd constituency)

Cynon Valley (Cwm Cynon) is a constituency of the Senedd. It elects one Member of the Senedd by the first past the post method of election. It is also one of eight constituencies in the South Wales Central electoral region, which elects four additional members, in addition to eight 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 Cynon Valley Westminster constituency. It is entirely within the preserved county of Mid Glamorgan.

The other seven constituencies of the region are Cardiff Central, Cardiff North, Cardiff South and Penarth, Cardiff West, Pontypridd, Rhondda and Vale of Glamorgan.

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.

Elections in the 2010s
''Note: The Electoral Commission record the UKIP regional vote here as 73. That figure would be by far the lowest in Wales and not in keeping with historic figures here or equivalent figures elsewhere in the South Wales Valleys, South Wales Central and Wales at this election.'' Regional ballots rejected at the count: 118<

Elections in the 2000s
2003 Electorate: 44,473 Regional ballots rejected: 345

Elections in the 1990s
1999 Electorate: 47,508