An election to the 56th Parliament of the United Kingdom for the constituency area of Kilmarnock and Loudoun, held as part of the general election on 7 May 2015.
SNP gain from Labour Co-operative by Alan Brown with a majority of 13,638 - 25.3% - on a turnout of 71.6%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| BROWN, Alan | SNP | 30,000 | 55.7% | 29.7% |
| JAMIESON, Cathy | Lab / Co-op | 16,362 | 30.4% | -22.2% |
| WHITTLE, Brian | Con | 6,752 | 12.5% | -1.6% |
| ACKLAND, Rod | LD | 789 | 1.5% | -5.9% |
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 75,250, having a valid vote count of 53,903 and an invalid vote count of 92.
Result declared at 02:11 on 8 May 2015.