An election to the 57th Parliament of the United Kingdom for the constituency area of Lincoln, held as part of the general election on 8 June 2017.
Labour gain from Conservatives by Karen Lee with a majority of 1,538 - 3.2% - on a turnout of 66.6%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| LEE, Karen | Lab | 23,333 | 47.9% | 8.3% |
| MCCARTNEY, Karl | Con | 21,795 | 44.7% | 2.1% |
| SMITH, Nick | UKIP | 1,287 | 2.6% | -9.6% |
| KENYON, Caroline | LD | 1,284 | 2.6% | -1.6% |
| LORYMAN, Benjamin | Green | 583 | 1.2% | - |
| GRAY, Phil | Ind | 312 | 0.6% | - |
| SCOTT-BURDON, Iain | Ind | 124 | 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 73,111, having a valid vote count of 48,718 and an invalid vote count of 79.
Result declared at 04:03 on 9 June 2017.