An election to the 57th Parliament of the United Kingdom for the constituency area of Clwyd South, held as part of the general election on 8 June 2017.
Labour hold by Susan Elan Jones with a majority of 4,356 - 11.6% - on a turnout of 69.7%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| JONES, Susan Elan | Lab | 19,002 | 50.7% | 13.5% |
| BAYNES, Simon | Con | 14,646 | 39.1% | 8.7% |
| ALLEN, Christopher | PC | 2,293 | 6.1% | -4.2% |
| BASSFORD-BARTON, Jeanette | UKIP | 802 | 2.1% | -13.5% |
| ROBERTS, Bruce | LD | 731 | 2.0% | -1.9% |
Under section 13(b) of the Representation of the People Act 1985, a candidate gaining 5% or less of the vote share will forfeit their deposit.
An electorate of 53,729, having a valid vote count of 37,474 and an invalid vote count of 56.
Result declared at 01:41 on 9 June 2017.