An election to the 58th Parliament of the United Kingdom for the constituency area of Knowsley, held as part of the general election on 12 December 2019.
Labour hold by George Howarth with a majority of 39,942 - 72.7% - on a turnout of 65.3%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| HOWARTH, George | Lab | 44,374 | 80.8% | -4.6% |
| MILLNS, Rushi | Con | 4,432 | 8.1% | -1.2% |
| MCCULLOUGH, Tim | BRX | 3,348 | 6.1% | - |
| WOODRUFF, Paul | Green | 1,262 | 2.3% | 1.4% |
| SLUPSKY, Joe | LD | 1,117 | 2.0% | -0.1% |
| CATESBY, Ray | Lib | 405 | 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 84,082, having a valid vote count of 54,938 and an invalid vote count of 133.
Result declared at 01:46 on 13 December 2019.