An election to the 56th Parliament of the United Kingdom for the constituency area of Rossendale and Darwen, held as part of the general election on 7 May 2015.
Conservative hold by Jake Berry with a majority of 5,654 - 11.5% - on a turnout of 66.4%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| BERRY, Jake | Con | 22,847 | 46.6% | 4.8% |
| STRAW, Will | Lab | 17,193 | 35.1% | 2.8% |
| BALCHIN, Clive | UKIP | 6,862 | 14.0% | 10.6% |
| POLLARD-RYLANCE, Karen | Green | 1,046 | 2.1% | - |
| ANWAR, Afzal | LD | 806 | 1.6% | -16.5% |
| SCRANAGE, Kevin | Ind | 122 | 0.2% | - |
| THOMAS, Simon | TUSC | 103 | 0.2% | - |
| HARGREAVES, Shaun | NorP | 45 | 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 73,779, having a valid vote count of 49,024 and an invalid vote count of 140.
Result declared at 04:37 on 8 May 2015.