An election to the 56th Parliament of the United Kingdom for the constituency area of Twickenham, held as part of the general election on 7 May 2015.
Conservative gain from Liberal Democrats by Tania Mathias with a majority of 2,017 - 3.3% - on a turnout of 77.3%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| MATHIAS, Tania | Con | 25,580 | 41.3% | 7.2% |
| CABLE, Vincent | LD | 23,563 | 38.0% | -16.4% |
| GRANT, Nick | Lab | 7,129 | 11.5% | 3.8% |
| EDWARDS, Barry | UKIP | 3,069 | 4.9% | 3.5% |
| WILLIAMS, Tanya | Green | 2,463 | 4.0% | 2.8% |
| STOCKFORD, Dominic | CHP | 174 | 0.3% | - |
| WEDGWOOD, David | MCCP | 26 | 0.0% | -0.0% |
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 80,250, having a valid vote count of 62,004 and an invalid vote count of 122.
Result declared at 04:45 on 8 May 2015.