An election to the 56th Parliament of the United Kingdom for the constituency area of Monmouth, held as part of the general election on 7 May 2015.
Conservative hold by David Davies with a majority of 10,982 - 23.1% - on a turnout of 76.2%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| DAVIES, David | Con | 23,701 | 49.9% | 1.6% |
| JONES, Ruth | Lab | 12,719 | 26.8% | 0.9% |
| DUNN, Gareth | UKIP | 4,942 | 10.4% | 8.0% |
| GERMAN, Veronica | LD | 2,496 | 5.3% | -14.1% |
| CLARK, Jonathan | PC | 1,875 | 4.0% | 1.2% |
| WERE, Chris | Green | 1,629 | 3.4% | 2.2% |
| MORRIS, Stephen | ED | 100 | 0.2% | - |
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 62,248, having a valid vote count of 47,462 and an invalid vote count of 104.
Result declared at 06:09 on 8 May 2015.