2021 Dublin Bay South by-election
A by-election was held in the Dáil Éireann constituency of Dublin Bay South in Ireland on Thursday, 8 July 2021, to fill the vacancy left by the resignation of the Fine Gael TD Eoghan Murphy. The by-election was won by Senator Ivana Bacik of the Labour Party.
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| Turnout | 34.7% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Bacik was able to overcome low poll numbers nationally for the Labour Party as well as defy attempts by Fine Gael and Sinn Féin to define the by-election as an ideological showdown solely between the two of them. In stark contrast to Labour's success, the by-election was also noted for the disastrous result suffered by Fianna Fáil, with a number of publications declaring it the single worst election result in the party's tenured history.
Fifteen candidates were nominated, ten from political parties and five independents. The electorate was 72,302.
The polls closed at 22:30 on Thursday 8 July. The Irish Times predicted that the final turnout figure would be no more than 40%, and contrasted that with the 52% turnout in Dublin Bay South at the last general election. The count showed a turnout of 34.7%, which was higher than some predictions, and exceeded the 26% turnout at both the Dublin Fingal and Dublin Mid-West by-elections in 2019.