An election to the 57th Parliament of the United Kingdom for the constituency area of Cynon Valley, held as part of the general election on 8 June 2017.
Labour hold by Ann Clwyd with a majority of 13,238 - 41.6% - on a turnout of 62.0%.
Candidates
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 51,334, having a valid vote count of 31,802 and an invalid vote count of 71.
Result declared at 02:27 on 9 June 2017.