| Election Name: | 2009 Dublin Central by-election |
| Country: | Ireland |
| Type: | presidential |
| Ongoing: | no |
| Previous Year: | 2007 general election |
| Election Date: | 5 June 2009 |
| Next Year: | 2011 general election |
| Turnout: | 28,803 (46.3%) |
| 2Blank: | Percentage |
| 3Blank: | Final count |
| Party1: | Independent politician |
| 1Data1: | 7,639 |
| 2Data1: | 26.9 |
| 3Data1: | 13,739 |
| Party2: | Fine Gael |
| 1Data2: | 6,439 |
| 2Data2: | 22.7 |
| 3Data2: | 10,198 |
| Party3: | Labour Party (Ireland) |
| 1Data3: | 4,926 |
| 2Data3: | 17.3 |
| 3Data3: | – |
| Party4: | Sinn Féin |
| 1Data4: | 3,770 |
| 2Data4: | 13.3 |
| 3Data4: | – |
| Party5: | Fianna Fáil |
| 1Data5: | 3,483 |
| 2Data5: | 13.3 |
| 3Data5: | – |
| Party6: | Green Party (Ireland) |
| 1Data6: | 819 |
| 2Data6: | 2.9 |
| 3Data6: | – |
| Nominee7: | Patrick Talbot |
| Party7: | Immigration Control Platform |
| 1Data7: | 614 |
| 2Data7: | 2.2 |
| 3Data7: | – |
| Nominee8: | Malachy Steenson |
| Party8: | Workers' Party (Ireland) |
| 1Data8: | 519 |
| 2Data8: | 1.8 |
| 3Data8: | – |
| Nominee9: | Paul O'Loughlin |
| Party9: | Christian Solidarity Party |
| 1Data9: | 203 |
| 2Data9: | 0.7 |
| 3Data9: | – |
| Map Size: | 150px |
| TD | |
| Before Election: | Tony Gregory |
| Before Party: | Independent politician |
| After Election: | Maureen O'Sullivan |
| After Party: | Independent politician |
A by-election was held in the Dáil Éireann Dublin Central constituency in Ireland on Friday, 5 June 2009,[1] following the death of the Independent Teachta Dála (TD) Tony Gregory on 2 January 2009. The by-election was held on the same day as the 2009 European and local elections.[2] A by-election was held in the Dublin South constituency on the same date. There was no legal requirement on when to hold a by-election in Ireland in 2009 but they were generally held within six months.[3]
The independent candidate Maureen O'Sullivan, Gregory's former election agent, was elected on the eighth count.[4]