An election to the 57th Parliament of the United Kingdom for the constituency area of Welwyn Hatfield, held as part of the general election on 8 June 2017.
Conservative hold by Grant Shapps with a majority of 7,369 - 14.3% - on a turnout of 70.9%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| SHAPPS, Grant | Con | 26,374 | 51.0% | 0.7% |
| MIAH, Anawar | Lab | 19,005 | 36.8% | 10.6% |
| QUINTON, Nigel | LD | 3,836 | 7.4% | 1.2% |
| MILLIKEN, Dean | UKIP | 1,441 | 2.8% | -10.3% |
| SAYERS, Christianne | Green | 835 | 1.6% | -1.9% |
| JONES, Melvyn | Ind | 178 | 0.3% | - |
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 72,888, having a valid vote count of 51,669 and an invalid vote count of 109.
Result declared at 04:04 on 9 June 2017.