An election to the 57th Parliament of the United Kingdom for the constituency area of Dartford, held as part of the general election on 8 June 2017.
Conservative hold by Gareth Johnson with a majority of 13,186 - 24.3% - on a turnout of 69.1%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| JOHNSON, Gareth | Con | 31,210 | 57.6% | 8.6% |
| KAINI, Bachchu | Lab | 18,024 | 33.2% | 7.8% |
| FRYER, Ben | UKIP | 2,544 | 4.7% | -15.2% |
| BEARD, Simon | LD | 1,428 | 2.6% | -0.1% |
| BLATCHFORD, Andrew | Green | 807 | 1.5% | -1.0% |
| ADEWUNMI, Ola | Ind | 211 | 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 78,506, having a valid vote count of 54,224 and an invalid vote count of 117.
Result declared at 03:12 on 9 June 2017.