2009 Dublin South by-election

{{Use dmy dates|date=November 2021}}

{{Use Hiberno-English|date=November 2021}}

{{Infobox election

| election_name = 2009 Dublin South by-election

| country = Ireland

| type = presidential

| ongoing = no

| previous_year = 2007 general election

| election_date = 5 June 2009

| next_year = 2011 general election

| turnout = 52,479 (57.8%)

| 1blank = {{nowrap|First preferences}}

| 2blank = Percentage

|image1 = {{CSS image crop|Image=George Lee at count.jpg|bSize=120|cWidth=90|cHeight=120|oTop=0|oLeft=15}}

|nominee1 = George Lee

|party1 = Fine Gael

|1data1 = 27,768

|2data1 = 53.4%

|image2 = {{CSS image crop|Image=Alex White TD 2014 (cropped).jpg|bSize=120|cWidth=90|cHeight=120|oTop=0|oLeft=15}}

|nominee2 = Alex White

|party2 = Labour Party (Ireland)

|1data2 = 10,294

|2data2 = 19.8%

|image3 = {{CSS image crop|Image=Newly Elected Deputy Shay Brennan TD (Dec, 2024) (cropped).jpg|bSize=120|cWidth=90|cHeight=120|oTop=0|oLeft=15}}

|nominee3 = Shay Brennan

|party3 = Fianna Fáil

|1data3 = 9,250

|2data3 = 17.8%

|image4 =

|nominee4 = {{nowrap|Elizabeth Davidson}}

|party4 = Green Party (Ireland)

|1data4 = 1,846

|2data4 = 3.5%

|image5 =

|nominee5 = {{nowrap|Shaun Tracey}}

|party5 = Sinn Féin

|1data5 = 1,705

|2data5 = 3.3%

|image6 =

|nominee6 = {{nowrap|Ross O'Mullane}}

|party6 = Independent politician (Ireland)

|1data6 = 650

|2data6 = 1.2%

|image7 =

|nominee7 = Frank O'Gorman

|party7 = Independent politician (Ireland)

|1data7 = 351

|2data7 = 0.7%

|image8 =

|nominee8 = Noel O'Gara

|party8 = Independent politician (Ireland)

|1data8 = 172

|2data8 = 0.3%

| map_image = Dublin South Dáil Éireann constituency.png

| map_size = 150px

| map_caption = Dublin South shown within County Dublin

| title = TD

| before_election = Séamus Brennan

| before_party = Fianna Fáil

| after_election = George Lee

| after_party = Fine Gael

}}

A by-election was held in the Dáil Éireann Dublin South constituency in Ireland on Friday, 5 June 2009,{{cite news|url=http://www.irishtimes.com/newspaper/breaking/2009/0428/breaking72.htm|title=By-elections set for June 5th|date=28 April 2009|work=The Irish Times|access-date=29 April 2009|archive-date=25 September 2021|archive-url=https://web.archive.org/web/20210925160342/https://www.irishtimes.com/news/byelections-set-for-june-5th-1.839682|url-status=live}} following the death of the Fianna Fáil Teachta Dála (TD) Séamus Brennan on 9 July 2008. As Brennan was a Fianna Fáil TD, that party had the responsibility of deciding when the by-election should take place. It was held on the same day as the 2009 European and local elections.{{cite news|url=http://www.irishtimes.com/newspaper/ireland/2008/1125/1227486545297.html|title=FG may opt for high-profile by-election candidate|date=25 November 2008|work=The Irish Times|access-date=25 November 2008|archive-date=29 October 2010|archive-url=https://web.archive.org/web/20101029013501/http://www.irishtimes.com/newspaper/ireland/2008/1125/1227486545297.html|url-status=live}} There was no legal requirement on when to hold a by-election in Ireland in 2009 but it was generally held within six months.{{cite news|url=http://www.independent.ie/national-news/speculation-begins-over-who-will-fill-td-position-1430535.html|title=Speculation begins over who will fill TD position|work=Irish Independent|date=10 July 2008|first=Fionnan|last=Sheahan|access-date=14 July 2008|archive-date=12 December 2008|archive-url=https://web.archive.org/web/20081212025445/http://www.independent.ie/national-news/speculation-begins-over-who-will-fill-td-position-1430535.html|url-status=live}} A by-election in the Dublin Central constituency was held on the same date.

Eight candidates contested the vacant seat, with victory going to the Fine Gael candidate, George Lee who was elected on the first count.{{cite news|url=http://www.irishtimes.com/indepth/elections2009/results/byelections/dublinsouth.html|title=Dublin South|date=6 June 2009|work=The Irish Times|access-date=6 June 2009|archive-date=23 October 2010|archive-url=https://web.archive.org/web/20101023100002/http://www.irishtimes.com/indepth/elections2009/results/byelections/dublinsouth.html|url-status=live}}