An election to the 56th Parliament of the United Kingdom for the constituency area of Argyll and Bute, held as part of the general election on 7 May 2015.
SNP gain from Liberal Democrats by Brendan O'Hara with a majority of 8,473 - 16.3% - on a turnout of 75.3%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| O'HARA, Brendan | SNP | 22,959 | 44.3% | 25.3% |
| REID, Alan | LD | 14,486 | 27.9% | -3.7% |
| REDMAN, Alastair | Con | 7,733 | 14.9% | -9.1% |
| GALBRAITH, Mary | Lab | 5,394 | 10.4% | -12.3% |
| SANTOS, Caroline | UKIP | 1,311 | 2.5% | - |
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 68,875, having a valid vote count of 51,883 and an invalid vote count of 59.
Result declared at 05:39 on 8 May 2015.