An election to the 56th Parliament of the United Kingdom for the constituency area of Colchester, held as part of the general election on 7 May 2015.
Conservative gain from Liberal Democrats by Will Quince with a majority of 5,575 - 11.5% - on a turnout of 65.5%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| QUINCE, Will | Con | 18,919 | 38.9% | 6.1% |
| RUSSELL, Bob | LD | 13,344 | 27.5% | -20.5% |
| NEWELL, Jordan | Lab | 7,852 | 16.2% | 3.8% |
| PITTS, John | UKIP | 5,870 | 12.1% | 9.2% |
| GOACHER, Mark | Green | 2,499 | 5.1% | 3.6% |
| SCRIMSHAW, Ken | CPA | 109 | 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 74,204, having a valid vote count of 48,593 and an invalid vote count of 117.
Result declared at 05:44 on 8 May 2015.