An election to the 57th Parliament of the United Kingdom for the constituency area of Hertford and Stortford, held as part of the general election on 8 June 2017.
Conservative hold by Mark Prisk with a majority of 19,035 - 31.7% - on a turnout of 72.9%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| PRISK, Mark | Con | 36,184 | 60.3% | 4.2% |
| CHIBAH, Katherine | Lab | 17,149 | 28.6% | 10.7% |
| ARGENT, Mark | LD | 4,845 | 8.1% | 0.3% |
| WOOLCOMBE, David | Green | 1,814 | 3.0% | -1.7% |
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 82,339, having a valid vote count of 59,992 and an invalid vote count of 230.
Result declared at 02:15 on 9 June 2017.