An election to the 56th Parliament of the United Kingdom for the constituency area of Eastleigh, held as part of the general election on 7 May 2015.
Conservative gain from Liberal Democrats by Mims Davies with a majority of 9,147 - 16.5% - on a turnout of 69.7%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| DAVIES, Mims | Con | 23,464 | 42.3% | 2.9% |
| THORNTON, Mike | LD | 14,317 | 25.8% | -20.7% |
| CULLIGAN, Patricia | UKIP | 8,783 | 15.8% | 12.2% |
| LATHAM, Mark | Lab | 7,181 | 12.9% | 3.3% |
| MELDRUM, Ron | Green | 1,513 | 2.7% | - |
| HALL, Ray | Beer | 133 | 0.2% | - |
| CLUNE, Declan | TUSC | 114 | 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 79,609, having a valid vote count of 55,505 and an invalid vote count of 158.
Result declared at 04:37 on 8 May 2015.