An election to the 56th Parliament of the United Kingdom for the constituency area of Spelthorne, held as part of the general election on 7 May 2015.
Conservative hold by Kwasi Kwarteng with a majority of 14,152 - 28.8% - on a turnout of 68.6%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| KWARTENG, Kwasi | Con | 24,386 | 49.7% | 2.6% |
| CUNNINGHAM, Redvers | UKIP | 10,234 | 20.9% | 12.4% |
| GEACH, Rebecca | Lab | 9,114 | 18.6% | 2.1% |
| SHIMELL, Rosie | LD | 3,163 | 6.4% | -19.4% |
| JACOBS, Paul | Green | 1,724 | 3.5% | - |
| GRIFFITH, Juliet | Ind | 230 | 0.5% | - |
| COUCHMAN, Paul | TUSC | 228 | 0.5% | 0.1% |
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 71,592, having a valid vote count of 49,079 and an invalid vote count of 191.
Result declared at 07:25 on 8 May 2015.