An election to the 56th Parliament of the United Kingdom for the constituency area of Luton South, held as part of the general election on 7 May 2015.
Labour hold by Gavin Shuker with a majority of 5,711 - 13.5% - on a turnout of 62.3%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| SHUKER, Gavin | Lab / Co-op | 18,660 | 44.2% | 9.3% |
| REDMOND, Katie | Con | 12,949 | 30.7% | 1.3% |
| REHMAN, Muhammad | UKIP | 5,129 | 12.1% | 9.8% |
| AHMED, Ashuk | LD | 3,183 | 7.5% | -15.1% |
| HALL, Simon | Green | 1,237 | 2.9% | 2.1% |
| MALIK, Attiq | Ind | 900 | 2.1% | - |
| WESTON, Paul | Ind | 158 | 0.4% | - |
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 67,741, having a valid vote count of 42,216 and an invalid vote count of 431.
Result declared at 12:14 on 8 May 2015.