An election to the 57th Parliament of the United Kingdom for the constituency area of Eltham, held as part of the general election on 8 June 2017.
Labour hold by Clive Efford with a majority of 6,296 - 13.6% - on a turnout of 71.6%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| EFFORD, Clive | Lab | 25,128 | 54.4% | 11.8% |
| HARTLEY, Matt | Con | 18,832 | 40.8% | 4.4% |
| HALL-MATTHEWS, David | LD | 1,457 | 3.2% | 0.1% |
| CLARKE, John | BNP | 738 | 1.6% | - |
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 64,474, having a valid vote count of 46,155 and an invalid vote count of 150.
Result declared at 02:43 on 9 June 2017.