John McDonnell Elections won
Parliament Member page for John McDonnell
Elections listed as contested and won are those forming part of any general election or by-election contested since since the 2010 general election. A person may have contested an election outside of this grouping.
| Election | Constituency | Election type | Party | Vote count | Vote share | Majority |
| 12 December 2019 | Hayes and Harlington | General election | Lab | 24,545 | 55.8% | 9,261 |
| 8 June 2017 | Hayes and Harlington | General election | Lab | 31,796 | 66.5% | 18,115 |
| 7 May 2015 | Hayes and Harlington | General election | Lab | 26,843 | 59.6% | 15,700 |
| 6 May 2010 | Hayes and Harlington | General election | Lab | 23,377 | 54.8% | 10,824 |
Maiden speech
John McDonnell's maiden speech was made on 6 June 1997, as the member for Hayes and Harlington. The speech took place in the 1st session of the 52nd Parliament.