Compiled by EveryElectionResult.com's data team · Last updated 2026-08-30
Cynon Valley was won by Labour at the 2019 general election, with a majority of 8,822 votes over Conservative. This page covers every general election in Cynon Valley from 1983 to 2019.
Full Election History, 1983–2019
Election
Elected
Votes
Vote Share
Runner-up
Majority
Turnout
1983
Ioan Evans (Labour)
20,668
56.0%
Felix Aubel (Social Democratic Party)
13,074 (35.4 pts)
73.4%
1987
Ann Clwyd (Labour)
26,222
68.9%
Keith Butler (Social Democratic Party)
21,571 (56.7 pts)
76.7%
1992
Ann Clwyd (Labour)
26,254
69.1%
Andrew Smith (Conservative)
21,364 (56.2 pts)
76.5%
1997
Ann Clwyd (Labour)
23,307
69.7%
Thomas Davies (Plaid Cymru)
19,755 (59.1 pts)
69.2%
2001
Ann Clwyd (Labour)
17,685
65.6%
Steven Cornelius (Plaid Cymru)
12,998 (48.2 pts)
55.5%
2005
Ann Clwyd (Labour)
17,074
64.1%
Geraint Benney (Plaid Cymru)
13,259 (49.8 pts)
58.7%
2010
Ann Clwyd (Labour)
15,681
52.5%
Dafydd Trystan Davies (Plaid Cymru)
9,617 (32.2 pts)
59.1%
2015
Ann Clwyd (Labour)
14,532
47.7%
Cerith Griffiths (Plaid Cymru)
9,406 (30.9 pts)
59.4%
2017
Ann Clwyd (Labour)
19,404
61.0%
Keith Dewhurst (Conservative)
13,238 (41.6 pts)
62.1%
2019
Beth Winter (Labour)
15,533
51.4%
Pauline Church (Conservative)
8,822 (29.2 pts)
59.3%
Full Result Breakdown by Election
1983
Candidate
Party
Votes
Share
Elected
Ioan Evans
Labour
20,668
56.0%
Yes
Felix Aubel
Social Democratic Party
7,594
20.6%
No
James Arbuthnot
Conservative
5,240
14.2%
No
Pauline Jarman
Plaid Cymru
3,421
9.3%
No
1987
Candidate
Party
Votes
Share
Elected
Ann Clwyd
Labour
26,222
68.9%
Yes
Keith Butler
Social Democratic Party
4,651
12.2%
No
Mark Bishop
Conservative
4,638
12.2%
No
Dorothy Richards
Plaid Cymru
2,549
6.7%
No
1992
Candidate
Party
Votes
Share
Elected
Ann Clwyd
Labour
26,254
69.1%
Yes
Andrew Smith
Conservative
4,890
12.9%
No
Terry Benney
Plaid Cymru
4,186
11.0%
No
Marcello Verma
Liberal Democrat
2,667
7.0%
No
1997
Candidate
Party
Votes
Share
Elected
Ann Clwyd
Labour
23,307
69.7%
Yes
Thomas Davies
Plaid Cymru
3,552
10.6%
No
Huw Price
Liberal Democrat
3,459
10.3%
No
Andrew Smith
Conservative
2,260
6.8%
No
Gwyn John
Referendum Party
844
2.5%
No
2001
Candidate
Party
Votes
Share
Elected
Ann Clwyd
Labour
17,685
65.6%
Yes
Steven Cornelius
Plaid Cymru
4,687
17.4%
No
Ian Parry
Liberal Democrat
2,541
9.4%
No
Julian Waters
Conservative
2,045
7.6%
No
2005
Candidate
Party
Votes
Share
Elected
Ann Clwyd
Labour
17,074
64.1%
Yes
Geraint Benney
Plaid Cymru
3,815
14.3%
No
Margaret Phelps
Liberal Democrat
2,991
11.2%
No
Antonia Dunn
Conservative
2,062
7.7%
No
Sue Davies
UKIP
705
2.6%
No
2010
Candidate
Party
Votes
Share
Elected
Ann Clwyd
Labour
15,681
52.5%
Yes
Dafydd Trystan Davies
Plaid Cymru
6,064
20.3%
No
Lee Thacker
Liberal Democrat
4,120
13.8%
No
Juliette Ash
Conservative
3,010
10.1%
No
Frank Hughes
UKIP
1,001
3.4%
No
2015
Candidate
Party
Votes
Share
Elected
Ann Clwyd
Labour
14,532
47.7%
Yes
Cerith Griffiths
Plaid Cymru
5,126
16.8%
No
Rebecca Rees-Evans
UKIP
4,976
16.3%
No
Keith Dewhurst
Conservative
3,676
12.1%
No
Angharad Jones
Liberal Democrat
830
2.7%
No
John Matthews
Green
799
2.6%
No
Chris Beggs
Socialist Labour
533
1.7%
No
2017
Candidate
Party
Votes
Share
Elected
Ann Clwyd
Labour
19,404
61.0%
Yes
Keith Dewhurst
Conservative
6,166
19.4%
No
Liz Walters
Plaid Cymru
4,376
13.8%
No
Ian McLean
UKIP
1,271
4.0%
No
Nicola Knight
Liberal Democrat
585
1.8%
No
2019
Candidate
Party
Votes
Share
Elected
Beth Winter
Labour
15,533
51.4%
Yes
Pauline Church
Conservative
6,711
22.2%
No
Rebecca Rees-Evans
Brexit Party
3,045
10.1%
No
Geraint Benney
Plaid Cymru
2,562
8.5%
No
Andrew Chainey
The Cynon Valley Party
1,322
4.4%
No
Steve Bray
Liberal Democrat
949
3.1%
No
Ian McLean
Social Democratic Party
114
0.4%
No
Margin Over Time
Winning margin (percentage points) at each election, coloured by the winning party.
Trend
Cynon Valley has been contested at 10 general elections on record since 1983. Parties that have won a seat here over that span: Labour.
Frequently Asked Questions
Who won Cynon Valley in the 2019 general election?
Labour won Cynon Valley in 2019 with 15,533 votes (51.4%), a majority of 8,822 votes over Conservative in second place.
Which parties have won Cynon Valley since 1983?
Since 1983, Cynon Valley has been won by: Labour.
What was the closest result in Cynon Valley?
The closest result on record for Cynon Valley was 2019, when Labour beat Conservative by just 8,822 votes (29.2 percentage points).