An election to the 56th Parliament of the United Kingdom for the constituency area of Mitcham and Morden, held as part of the general election on 7 May 2015.
Labour hold by Siobhain McDonagh with a majority of 16,922 - 37.5% - on a turnout of 65.9%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| MCDONAGH, Siobhain | Lab | 27,380 | 60.7% | 4.2% |
| HOLMES, Paul | Con | 10,458 | 23.2% | -2.1% |
| HILTON, Richard | UKIP | 4,287 | 9.5% | 7.5% |
| REDDING, Mason | Green | 1,422 | 3.2% | 2.3% |
| COMAN, Diana | LD | 1,378 | 3.1% | -8.8% |
| COKE, Des | CPA | 217 | 0.5% | - |
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 68,474, having a valid vote count of 45,142 and an invalid vote count of 147.
Result declared at 02:41 on 8 May 2015.