An election to the 56th Parliament of the United Kingdom for the constituency area of West Dunbartonshire, held as part of the general election on 7 May 2015.
SNP gain from Labour Co-operative by Martin Docherty with a majority of 14,171 - 27.7% - on a turnout of 73.9%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| DOCHERTY, Martin | SNP | 30,198 | 59.0% | 38.9% |
| DOYLE, Gemma | Lab / Co-op | 16,027 | 31.3% | -30.0% |
| CORRY, Maurice | Con | 3,597 | 7.0% | -0.6% |
| MORTON, Aileen | LD | 816 | 1.6% | -6.5% |
| MUIR, Claire | Ind | 503 | 1.0% | - |
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 69,208, having a valid vote count of 51,141 and an invalid vote count of 61.
Result declared at 02:23 on 8 May 2015.