UK Polling History: Election of 3 May 1984 – Cynon Valley
Result summary
| Parties | |||||
| Labour | SDP | Plaid Cymru |
Conservative | Others | |
| Votes | 19,389 | 6,554 | 3,619 | 2,441 | 979 |
| Votes gained | -1,279 | – | +198 | -2,799 | – |
| Share of votes | 58.8% | 19.9% | 11.0% | 7.4% | 3.0% |
| Share of eligible voters | 38.6% | 13.0% | 7.2% | 4.9% | 1.9% |
| Gain in share of votes | +2.8% | – | +1.7% | -6.8% | – |
| Gain in share of eligible voters | -2.1% | – | +0.5% | -5.5% | – |
| Total votes: | 32,982 | |
| Electorate: | 50,237 | |
| Turnout: | 65.6% | |
| Outcome: | Labour hold | |
| Swing: | 4.8% | Labour from Conservative |
Polling history
List of contests
| « |
Constituency formed from Aberdare, Brecon and Radnor, Neath 9 June 1983 |
| Date | Type | Parties | ||||||||||
| Labour | Plaid Cymru |
Conservative | Liberal Democrat |
Alliance | UKIP | SDP | Other | Brexit | Others | Green | ||
| Date | Type | Parties | ||||||||||
| Labour | Plaid Cymru |
Conservative | Liberal Democrat |
Alliance | UKIP | SDP | Other | Brexit | Others | Green | ||
| 12 December 2019 | General Election | 15,533 | 2,562 | 6,711 | 949 | 1,436 | 3,045 | 0 | ||||
| 8 June 2017 | General Election | 19,404 | 4,376 | 6,166 | 585 | 1,271 | 0 | |||||
| 7 May 2015 | General Election | 14,532 | 5,126 | 3,676 | 830 | 4,976 | 533 | 0 | 799 | |||
| 6 May 2010 | General Election | 15,681 | 6,064 | 3,010 | 4,120 | 1,001 | 0 | |||||
| 5 May 2005 | General Election | 17,074 | 3,815 | 2,062 | 2,991 | 705 | 0 | |||||
| 7 June 2001 | General Election | 17,685 | 4,687 | 2,045 | 2,541 | 0 | ||||||
| 1 May 1997 | General Election | 23,307 | 3,552 | 2,260 | 3,459 | 844 | 0 | |||||
| 9 April 1992 | General Election | 26,254 | 4,186 | 4,890 | 2,667 | 0 | ||||||
| 11 June 1987 | General Election | 26,222 | 2,549 | 4,638 | 4,651 | 0 | ||||||
| 3 May 1984 | By Election | 19,389 | 3,619 | 2,441 | 6,554 | 979 | ||||||
| 9 June 1983 | General Election | 20,668 | 3,421 | 5,240 | 7,594 | 0 | ||||||