# Dublin Bay South (Dáil constituency)

Dublin Bay South is a parliamentary constituency that has been represented in Dáil Éireann, the lower house of the Irish parliament or Oireachtas, since the 2016 general election. The constituency elects four deputies (Teachtaí Dála, commonly known as TDs) on the system of proportional representation by means of the single transferable vote (PR-STV).

## History and boundaries

It was established by the Electoral (Amendment) (Dáil Constituencies) Act 2013. The constituency incorporates the entirety of the former Dublin South-East constituency with the addition of territory from Dublin South-Central, centred on Terenure and Harold's Cross. The constituency was named Dublin Bay South for "reasons of symmetry", with the new Dublin Bay North constituency.
The Constituency Review Report 2023 of the Electoral Commission recommended that at the next general election Dublin Bay South be altered by the transfer of territory to Dublin South-Central.
The Electoral (Amendment) Act 2023 defines the constituency as:
       Mansion House A, Mansion House B, Pembroke East A, Pembroke East B, Pembroke East C, Pembroke East D, Pembroke East E, Pembroke West A, Pembroke West B, Pembroke West C, Rathfarnham, Rathmines East A, Rathmines East B, Rathmines East C, Rathmines East D, Rathmines West A, Rathmines West B, Rathmines West C, Rathmines West D, Rathmines West E, Rathmines West F, Royal Exchange A, Royal Exchange B, St. Kevin's, South Dock, Terenure A, Terenure B, Terenure C, Terenure D, Wood Quay A, Wood Quay B."

### Voting patterns

In 2021, Dublin Bay South was characterised as a "Fine Gael heartland" by some of the Irish national media, noting the area (as Dublin South-East) was once the seat of Fine Gael leaders John A. Costello and Garret FitzGerald and their historical performance in the area. However, it has also been the seat of party leaders Ruairi Quinn and Ivana Bacik of the Labour Party, Michael McDowell of the Progressive Democrats, and John Gormley and Eamon Ryan of the Green Party. Dublin Bay South has been called "one of the most liberal constituencies in the country" as well as "one of the wealthiest". As Dublin South-East, the area had the highest vote against the introduction of the Eighth Amendment in 1983, and in the 2018 referendum it had the highest vote in favour of repealing it. It has been noted that between the Labour Party, the Green Party, the Social Democrats and Democratic Left, centre-left parties have won at least 29% of the vote in every election in the area between 1981 and 2021.
The constituency has been marked by the consistently low-voter turnout, normally coming in at 54%; this can be partially attributed to the high rate of residential turnover in the areas of Rathmines and Ranelagh.
As of 2021, half of adults in the constituency have been described as professionals, 57% of individuals have third-level qualifications, and 44% live in privately rented apartments.

## TDs

Teachtaí Dála (TDs) for Dublin Bay South 2016– :
| Key to parties  FF = Fianna Fáil  FG = Fine Gael  GP = Green  Lab = Labour  SF = Sinn Féin  SD = Social Democrats ||||||||||
| Dáil | Election | Deputy (Party) | Deputy (Party) | Deputy (Party) | Deputy (Party) | Deputy (Party) | Deputy (Party) | Deputy (Party) | Deputy (Party) |
| 32nd | 2016 | | Eamon Ryan (GP) | | Jim O'Callaghan (FF) | | Kate O'Connell (FG) | | Eoghan Murphy (FG) |
| 33rd | 2020 | | Eamon Ryan (GP) | | Jim O'Callaghan (FF) | | Chris Andrews (SF) | | Eoghan Murphy (FG) |
| 33rd | 2021 by-election | | Eamon Ryan (GP) | | Jim O'Callaghan (FF) | | Chris Andrews (SF) | | Ivana Bacik (Lab) |
| 34th | 2024 | | James Geoghegan (FG) | | Jim O'Callaghan (FF) | | Eoin Hayes (SD) | | Ivana Bacik (Lab) |
Note: The columns in this table are used only for presentational purposes, and no significance should be attached to the order of columns. For details of the order in which seats were won at each election, see the detailed results of that election.

## Elections

^ *: Outgoing TD

### 2024 general election

2024 general election: Dublin Bay South :
| Party | Party | Candidate | FPv% | Count | Count | Count | Count | Count | Count | Count | Count | Count | Count | Count | Count |
| Party | Party | Candidate | FPv% | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
| | Fine Gael | James Geoghegan | 15.2 | 6,060 | 6,069 | 6,118 | 6,171 | 6,173 | 6,464 | 6,673 | 7,060 | 10,650 | | | |
| | Labour | Ivana Bacik | 14.3 | 5,684 | 5,685 | 5,763 | 5,795 | 5,940 | 6,250 | 6,359 | 7,945 | 8,542 | | | |
| | Fianna Fáil | Jim O'Callaghan | 13.9 | 5,536 | 5,541 | 5,630 | 5,779 | 5,792 | 6,191 | 6,562 | 6,723 | 7,381 | 9,751 | | |
| | Sinn Féin | Chris Andrews | 12.2 | 4,875 | 4,884 | 4,993 | 5,166 | 5,518 | 5,584 | 5,960 | 6,091 | 6,139 | 6,163 | 6,258 | 6,294 |
| | Fine Gael | Emma Blain | 10.3 | 4,102 | 4,106 | 4,134 | 4,190 | 4,193 | 4,544 | 4,711 | 5,177 | | | | |
| | Social Democrats | Eoin Hayes | 9.1 | 3,615 | 3,619 | 3,676 | 3,702 | 4,361 | 4,507 | 4,724 | 5,535 | 5,673 | 5,972 | 6,754 | 7,017 |
| | Green | Hazel Chu | 8.2 | 3,250 | 3,258 | 3,297 | 3,332 | 3,438 | 3,609 | 3,680 | | | | | |
| | Independent | Kate O'Connell | 4.4 | 1,772 | 1,788 | 1,849 | 1,905 | 1,956 | | | | | | | |
| | Independent | Nick Delehanty | 3.9 | 1,542 | 1,600 | 1,776 | 2,108 | 2,150 | 2,272 | | | | | | |
| | PBP–Solidarity | Brigid Purcell | 3.4 | 1,339 | 1,346 | 1,372 | 1,413 | | | | | | | | |
| | Aontú | Alan Healy | 2.4 | 956 | 999 | 1,107 | | | | | | | | | |
| | Independent | Mannix Flynn | 1.2 | 479 | 491 | | | | | | | | | | |
| | Independent | Peter Dooley | 0.9 | 358 | 383 | | | | | | | | | | |
| | The Irish People | Lauralee Doyle | 0.4 | 150 | | | | | | | | | | | |
| | Independent | Daniel Pocock | 0.1 | 27 | | | | | | | | | | | |
| | Independent | John Keigher | 0.1 | 23 | | | | | | | | | | | |
| | Independent | David Hennessy | 0.1 | 16 | | | | | | | | | | | |
| Electorate: 83,689 Valid: 39,784 Spoilt: 195 Quota: 7,957 Turnout: 47.8% ||||||||||||||||
* ↑ Purcell is a member of People Before Profit.

### 2021 by-election

A by-election took place on 8 July 2021, to fill the vacancy left by the resignation of Eoghan Murphy.
2021 by-election: Dublin Bay South :
| Party | Party | Candidate | FPv% | Count | Count | Count | Count | Count | Count | Count | Count | Count |
| Party | Party | Candidate | FPv% | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| | Labour | Ivana Bacik | 30.2 | 8,131 | 8,134 | 8,146 | 8,188 | 8,308 | 8,380 | 8,851 | 9,474 | 13,382 |
| | Fine Gael | James Geoghegan | 26.2 | 7,052 | 7,054 | 7,093 | 7,134 | 7,147 | 7,354 | 7,400 | 8,265 | 9,235 |
| | Sinn Féin | Lynn Boylan | 15.8 | 4,245 | 4,245 | 4,246 | 4,357 | 4,695 | 4,779 | 4,985 | 5,237 | |
| | Green | Claire Byrne | 8.0 | 2,157 | 2,164 | 2,170 | 2,197 | 2,264 | 2,360 | 2,610 | 2,985 | |
| | Fianna Fáil | Deirdre Conroy | 4.6 | 1,247 | 1,250 | 1,256 | 1,278 | 1,288 | 1,380 | 1,402 | | |
| | Independent | Mannix Flynn | 3.3 | 879 | 882 | 894 | 975 | 1,003 | 1,120 | 1,181 | | |
| | Social Democrats | Sarah Durcan | 3.2 | 849 | 852 | 854 | 886 | 1,077 | 1,111 | | | |
| | PBP–Solidarity | Brigid Purcell | 2.8 | 759 | 762 | 768 | 818 | | | | | |
| | Aontú | Mairéad Tóibín | 2.8 | 740 | 745 | 798 | 940 | 958 | | | | |
| | Independent | Peter Dooley | 1.0 | 261 | 266 | 271 | | | | | | |
| | National Party | Justin Barrett | 0.7 | 183 | 186 | 194 | | | | | | |
| | Independent | Dolores Cahill | 0.6 | 169 | 171 | 179 | | | | | | |
| | Renua | Jacqui Gilbourne | 0.6 | 164 | 166 | | | | | | | |
| | Independent | John Keigher | 0.1 | 23 | | | | | | | | |
| | Independent | Colm O'Keeffe | 0.1 | 23 | | | | | | | | |
| Electorate: 77,924 Valid: 26,882 Spoilt: 162 Quota: 13,442 Turnout: 27,044 (34.7%) |||||||||||||
* ↑ Purcell is a member of People Before Profit.

### 2020 general election

2020 general election: Dublin Bay South :
| Party | Party | Candidate | FPv% | Count | Count | Count | Count | Count | Count | Count | Count |
| Party | Party | Candidate | FPv% | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| | Green | Eamon Ryan | 22.4 | 8,888 | | | | | | | |
| | Sinn Féin | Chris Andrews | 16.1 | 6,361 | 6,412 | 6,421 | 6,513 | 6,658 | 6,715 | 7,837 | 8,797 |
| | Fine Gael | Eoghan Murphy | 16.0 | 6,346 | 6,464 | 6,473 | 6,489 | 6,544 | 6,638 | 6,767 | 7,602 |
| | Fianna Fáil | Jim O'Callaghan | 13.8 | 5,474 | 5,587 | 5,597 | 5,622 | 5,718 | 5,977 | 6,180 | 7,158 |
| | Fine Gael | Kate O'Connell | 11.7 | 4,624 | 4,785 | 4,795 | 4,810 | 4,869 | 4,891 | 5,127 | 6,270 |
| | Labour | Kevin Humphreys | 7.9 | 3,121 | 3,355 | 3,375 | 3,406 | 3,516 | 3,589 | 4,971 | |
| | Social Democrats | Sarah Durcan | 4.5 | 1,801 | 1,988 | 2,021 | 2,081 | 2,158 | 2,210 | | |
| | Solidarity–PBP | Annette Mooney | 2.5 | 1,002 | 1,049 | 1,062 | 1,145 | 1,243 | 1,282 | | |
| | Independent | Mannix Flynn | 1.6 | 645 | 675 | 690 | 753 | | | | |
| | Renua | Jacqui Gilborne | 1.6 | 634 | 643 | 656 | 802 | 847 | | | |
| | Independent | Peter Dooley | 0.7 | 281 | 288 | 317 | | | | | |
| | Irish Freedom | Ben Scallan | 0.6 | 245 | 248 | 255 | | | | | |
| | Independent | Norma Burke | 0.3 | 110 | 116 | | | | | | |
| | Independent | John Keigher | 0.1 | 48 | 50 | | | | | | |
| | Independent | Sean O'Leary | 0.0 | 11 | 12 | | | | | | |
| Electorate: 76,514 Valid: 39,591 Spoilt: 268 (0.7%) Quota: 7,919 Turnout: 39,759 (52.0%) ||||||||||||
* ↑ Mooney was a member of People Before Profit.

### 2016 general election

2016 general election: Dublin Bay South :
| Party | Party | Candidate | FPv% | Count | Count | Count | Count | Count | Count | Count | Count |
| Party | Party | Candidate | FPv% | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| | Fine Gael | Eoghan Murphy | 16.5 | 6,567 | 6,595 | 6,661 | 6,693 | 6,873 | 7,860 | 8,023 | |
| | Fine Gael | Kate O'Connell | 13.6 | 5,399 | 5,416 | 5,483 | 5,527 | 5,773 | 6,324 | 6,446 | 6,547 |
| | Fianna Fáil | Jim O'Callaghan | 11.5 | 4,575 | 4,596 | 4,674 | 4,744 | 4,949 | 5,989 | 6,678 | 6,921 |
| | Green | Eamon Ryan | 11.4 | 4,529 | 4,631 | 4,929 | 5,277 | 6,605 | 7,560 | 8,788 | |
| | Renua | Lucinda Creighton | 10.7 | 4,229 | 4,252 | 4,385 | 4,545 | 4,820 | | | |
| | Labour | Kevin Humphreys | 10.6 | 4,205 | 4,227 | 4,378 | 4,480 | 4,992 | 5,391 | 5,973 | 6,221 |
| | Sinn Féin | Chris Andrews | 9.5 | 3,774 | 3,796 | 3,957 | 4,511 | 4,888 | 5,197 | | |
| | Social Democrats | Glenna Lynch | 6.7 | 2,652 | 2,694 | 2,949 | 3,527 | | | | |
| | AAA–PBP | Annette Mooney | 4.4 | 1,728 | 1,819 | 2,149 | | | | | |
| | Independent | Mannix Flynn | 3.8 | 1,525 | 1,648 | | | | | | |
| | Independent | Alan MacStiofain | 0.6 | 235 | | | | | | | |
| | Independent | Eoin Tierney | 0.4 | 151 | | | | | | | |
| | Independent | William DJ Gorman | 0.2 | 97 | | | | | | | |
| | Independent | John Keigher | 0.1 | 37 | | | | | | | |
| Electorate: 73,066 Valid: 39,703 Spoilt: 313 (0.8%) Quota: 7,941 Turnout: 40,016 (54.8%) ||||||||||||