This list includes Irish supercentenarians (people from Ireland who have attained the age of at least 110 years) whose lifespans have been verified by an international body that specifically deals in longevity research, such as the Gerontology Research Group (GRG). There have been, including emigrants, 15 verified supercentenarians from Ireland. The oldest person ever to die in Ireland was Katherine Plunket at 111 years, 327 days. The oldest ever person born in Ireland was Kathleen Snavely, who died aged 113 years, 140 days in the United States. All Irish supercentenarians were born at a time when the island of Ireland was part of the United Kingdom.
Below is a list of the oldest people who were born on the island of Ireland.
| Rank | Name | Sex | data-sort-type="date" | Birth date | data-sort-type="date" | Death date | Age | Birth county | Place of death or residence | |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | data-sort-value="Snavely" | Kathleen Snavely | align=center | F | 16 February 1902 | 6 July 2015 | nowrap | Clare | United States | |
| 2 | data-sort-value="Scott" | Annie Scott | align=center | F | 15 March 1883 | 21 April 1996 | Tyrone[1] | Scotland (UK) | ||
| 3 | data-sort-value="Irwin" | Henrietta Irwin | align=center | F | 27 May 1906 | 15 January 2019 | Antrim | Canada | ||
| 4 | data-sort-value="Plunket" | Katherine Plunket | align=center | F | nowrap | 22 November 1820 | 14 October 1932 | Louth | Louth | |
| 5 | data-sort-value="Munson" | Elizabeth Munson | align=center | F | nowrap | 6 May 1872 | 2 February 1984 | Dublin | Dublin | |
| 6 | data-sort-value="Hegarty" | Margaret Hegarty | align=center | F | 2 April 1880 | 14 November 1991 | United States | |||
| 7 | data-sort-value="Webster" | Jane Webster[2] | align=center | F | 17 April 1906 | 31 October 2017 | Antrim | England (UK) | ||
| 8 | data-sort-value="Dolan" | Margaret Dolan | align=center | F | 30 August 1893 | 2 December 2004 | Galway | |||
| 9 | data-sort-value="Linehan" | Margaret Linehan | align=center | F | nowrap | 27 April 1892 | 18 February 2003 | Cork | United States | |
| 10 | data-sort-value="Furey" | Catherine Furey | align=center | F | 6 April 1893 | nowrap | 30 November 2003 | United States | ||
| 11 | data-sort-value="Watkins" | Elizabeth Watkins | align=center | F | 10 March 1863 | 21 October 1973[3] | Antrim | Antrim (UK) | ||
| 12 | data-sort-value="Green" | Ellen Green | align=center | F | 19 July 1878 | 4 December 1988 | Antrim | Canada | ||
| 13 | data-sort-value="Geaney" | Mary Ellen Geaney | align=center | F | 2 January 1886 | 5 April 1996 | Cork | Cork | ||
| 14 | data-sort-value="Nicholl" | Maud Nicholl[4] | align=center | F | 3 July 1909 | nowrap | 19 September 2019[5] | Antrim | Antrim (UK) | |
| 15 | data-sort-value="Bly" | Margaret Bly | align=center | F | 28 June 1894 | 4 August 2004 | United States |