An election to the 56th Parliament of the United Kingdom for the constituency area of Castle Point, held as part of the general election on 7 May 2015.
Conservative hold by Rebecca Harris with a majority of 8,934 - 19.7% - on a turnout of 66.7%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| HARRIS, Rebecca | Con | 23,112 | 50.9% | 6.9% |
| HUNTMAN, Jamie | UKIP | 14,178 | 31.2% | - |
| COOKE, Joe | Lab | 6,283 | 13.8% | -0.9% |
| ELLIS, Dominic | Green | 1,076 | 2.4% | - |
| DAVEY, Sereena | LD | 801 | 1.8% | -7.6% |
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 68,170, having a valid vote count of 45,450 and an invalid vote count of 117.
Result declared at 09:17 on 8 May 2015.