An election to the 56th Parliament of the United Kingdom for the constituency area of Lancaster and Fleetwood, held as part of the general election on 7 May 2015.
Labour gain from Conservatives by Catherine Smith with a majority of 1,265 - 3.0% - on a turnout of 67.4%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| SMITH, Catherine | Lab | 17,643 | 42.3% | 7.0% |
| OLLERENSHAW, Eric | Con | 16,378 | 39.2% | 3.2% |
| ATKINS, Matthew | UKIP | 4,060 | 9.7% | 7.3% |
| COATES, Chris | Green | 2,093 | 5.0% | 0.6% |
| LONG, Robin | LD | 1,390 | 3.3% | -15.8% |
| ELLETSON, Harold | Ind | 174 | 0.4% | - |
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 61,922, having a valid vote count of 41,738 and an invalid vote count of 172.
Result declared at 08:09 on 8 May 2015.