An election to the 56th Parliament of the United Kingdom for the constituency area of Arfon, held as part of the general election on 7 May 2015.
Plaid Cymru hold by Hywel Williams with a majority of 3,668 - 13.7% - on a turnout of 66.3%.
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 40,492, having a valid vote count of 26,837 and an invalid vote count of 95.
Result declared at 02:17 on 8 May 2015.