An election to the 58th Parliament of the United Kingdom for the constituency area of Blackburn, held as part of the general election on 12 December 2019.
Labour hold by Kate Hollern with a majority of 18,304 - 40.9% - on a turnout of 62.8%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| HOLLERN, Kate | Lab | 29,040 | 64.9% | -4.8% |
| GILL, Claire | Con | 10,736 | 24.0% | -2.9% |
| MOORE, Rick | BRX | 2,770 | 6.2% | - |
| WALLER-SLACK, Beth | LD | 1,130 | 2.5% | 1.0% |
| HOSSAIN, Reza | Green | 741 | 1.7% | - |
| SHAH, Rizwan Ali | Ind | 319 | 0.7% | - |
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 71,234, having a valid vote count of 44,736 and an invalid vote count of 109.
Result declared at 02:25 on 13 December 2019.