| Name | Position | Party | Constituency |
|---|---|---|---|
| Mairéad Tóibín | Former Representative | Aontú | |
| Emer Tóibín | Councillor | Aontú | Navan |
| Sharon Tolan | Councillor | Fine Gael | Laytown-Bettystown |
| Aislinn Tongue | Former Representative | Independent | |
| Gillian Toole | Councillor | Unknown | Ratoath |
| Finian Toomey | Former Representative | Aontú | |
| Conor Tormey | Councillor | Fianna Fáil | Ashbourne |
| Aoibhinn Tormey | Councillor | Unknown | Howth-Malahide |
| Natalie Treacy | Councillor | Sinn Féin | Castleknock |
| Seamus Treanor | Councillor | Independent | Monaghan |
| Pat Treanor | Councillor | Sinn Féin | Ballybay-Clones |
| Robert Troy | TD | Fianna Fáil | Longford-Westmeath |
| Richard Truell | Councillor | Fine Gael | Ballybay-Clones |
| Joanna Tuffy | Councillor | Labour | Lucan |
| Pauline Tully | TD | Sinn Féin | Cavan-Monaghan |
| Oliver Tully | Former Representative | Fine Gael | |
| Eileen Tully | Councillor | Fine Gael | Drogheda Rural |
| Noel Tuohy | Councillor | Labour | Portlaoise |
| Liam Twomey | Former Representative | Fine Gael | |
| Danielle Twomey | Councillor | Sinn Féin | Midleton |
| Kenny Tynan | Former Representative | People Before Profit | |
| Stephen Tynan | Former Representative | People Before Profit | |
| Ted Tynan | Councillor | Workers Party | Cork City North East |
| Sarah Tyrell | Former Representative | Renua Ireland | |
| Sean Tyrrell | Former Representative | Sinn Féin | |
| Kamal Uddin | Former Representative | Labour | |
| Roisín Uí Bhroin | Former Representative | People Before Profit | |
| Oghenetano John Uwhumiakpor | Former Representative | People Before Profit | |
| Liam van der Spek | Former Representative | Labour | |
| Jillian van Turnhout | Former Representative | Independent |