An election to the 56th Parliament of the United Kingdom for the constituency area of Windsor, held as part of the general election on 7 May 2015.
Conservative hold by Adam Afriyie with a majority of 25,083 - 50.0% - on a turnout of 70.1%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| AFRIYIE, Adam | Con | 31,797 | 63.4% | 2.5% |
| DENT, Fiona | Lab | 6,714 | 13.4% | 3.5% |
| MALIK, Tariq | UKIP | 4,992 | 10.0% | 6.7% |
| FUSSEY, George | LD | 4,323 | 8.6% | -13.8% |
| WALL, Derek | Green | 1,834 | 3.7% | 2.4% |
| DA COSTA, Wisdom | Ind | 500 | 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 71,538, having a valid vote count of 50,160 and an invalid vote count of 189.
Result declared at 06:47 on 8 May 2015.