| Name | Position | Party | Constituency |
|---|---|---|---|
| Hugh D Conlon | Councillor | Unknown | Ardee |
| Marcia D'Alton | Councillor | Independent | Carrigaline |
| Paul D'Alton | Former Representative | Independent | |
| Jim D'Arcy | Former Representative | Fine Gael | |
| Úna D'Arcy | Former Representative | Sinn Féin | |
| Michael D’Arcy | Senator | Fine Gael | Agricultural Panel |
| Andrea Dalton | Councillor | Fianna Fáil | Carlow |
| John Dalton | Former Representative | Renua Ireland | |
| Mark Dalton | Former Representative | Fianna Fáil | |
| Ben Dalton O’Sullivan | Councillor | Unknown | Carrigaline |
| Anna Daly | Former Representative | Aontú | |
| Jim Daly | Former Representative | Fine Gael | |
| Clare Daly | MEP | Independents 4 Change | Dublin |
| John Daly | Former Representative | The National Party | |
| Paul Daly | Senator | Fianna Fáil | Agricultural Panel |
| Mark Daly | Senator | Fianna Fáil | Administrative Panel |
| Frankie Daly | Councillor | Labour | Limerick City North |
| Kevin Daly | Former Representative | Independent | |
| Pa Daly | TD | Sinn Féin | Kerry |
| Pat Daly | Councillor | Fianna Fáil | Ennis |
| Joe Daly | Former Representative | People Before Profit | |
| Martin Khare Daly | Former Representative | Independent | |
| Davy Daniels | Councillor | Independent | Waterford City East |
| Tom Darcy | Former Representative | Direct Democracy Ireland - National Citizens Movement | |
| Gerard Darcy | Councillor | Fine Gael | Nenagh |
| Nicola Daveron | Former Representative | Renua Ireland | |
| Alan Daveron | Former Representative | Renua Ireland | |
| Aoife Davitt | Councillor | Fianna Fáil | Mullingar |
| Edward Robert Davitt | Former Representative | Independent | |
| Aidan Davitt | Senator | Fianna Fáil | Industrial and Commercial Panel |