Siobhain McDonagh Elections won
Parliament Member page for Siobhain McDonagh
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 | Mitcham and Morden | General election | Lab | 27,964 | 61.1% | 16,482 |
| 8 June 2017 | Mitcham and Morden | General election | Lab | 33,039 | 68.7% | 21,375 |
| 7 May 2015 | Mitcham and Morden | General election | Lab | 27,380 | 60.7% | 16,922 |
| 6 May 2010 | Mitcham and Morden | General election | Lab | 24,722 | 56.4% | 13,666 |
Maiden speech
Siobhain McDonagh's maiden speech was made on 17 June 1997, as the member for Mitcham and Morden. The speech took place in the 1st session of the 52nd Parliament.