An election to the 58th Parliament of the United Kingdom for the constituency area of Brentford and Isleworth, held as part of the general election on 12 December 2019.
Labour hold by Ruth Cadbury with a majority of 10,514 - 18.0% - on a turnout of 68.0%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| CADBURY, Ruth | Lab | 29,266 | 50.2% | -7.2% |
| SHAH, Seena | Con | 18,752 | 32.2% | -5.5% |
| CROSS, Helen | LD | 7,314 | 12.5% | 7.5% |
| GOLDSMITH, Daniel | Green | 1,829 | 3.1% | - |
| O'SULLIVAN, Lucy | BRX | 1,165 | 2.0% | - |
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 85,775, having a valid vote count of 58,326 and an invalid vote count of 145.
Result declared at 04:22 on 13 December 2019.