| Name | Position | Party | Constituency |
|---|---|---|---|
| Des Cahill | Councillor | Fine Gael | Cork City South-East |
| Michael Cahill | Councillor | Independent | South and West Kerry |
| Jackie Cahill | TD | Fianna Fáil | Tipperary |
| Mick Cahill | Councillor | Fianna Fáil | Ballymahon |
| Richard Cahill | Former Representative | Independent | |
| Maíria Cahill | Former Representative | Labour | |
| Bernard Caldwell | Councillor | Independent | Celbridge-Leixlip |
| Mícheál Callaghan | Former Representative | Green Party | |
| Willie Callaghan | Former Representative | Fianna Fáil | |
| Liam Callaghan | Councillor | Unknown | Boyle |
| Deborah Callaghan | Councillor | Fianna Fáil | Naas |
| Kevin Callan | Councillor | Fine Gael | Drogheda |
| Dara Calleary | TD | Fianna Fáil | Mayo |
| Billy Cameron | Councillor | Labour | Galway City Central |
| John Campbell | Councillor | Independent | Donegal |
| Aidan Campbell | Councillor | Fine Gael | Carrickmacross-Castleblayney |
| Seán Canney | TD | Independent | Galway East |
| Ivan Canning | Councillor | Fianna Fáil | Loughrea |
| Paul Canning | Councillor | Fianna Fáil | Inishowen |
| Ross Cannon | Former Representative | Independent | |
| Ciaran Cannon | TD | Fine Gael | Galway East |
| Derry Canty | Councillor | Fine Gael | Ballincollig-Carrigaline |
| Catherine Carey | Councillor | Sinn Féin | Clonmel |
| John Carey | Councillor | Fine Gael | Waterford City East |
| Joe Carey | TD | Fine Gael | Clare |
| Cathleen Carney-Boud | Councillor | Sinn Féin | Ballymun |
| Brendan Carr | Councillor | Labour | Cabra-Finglas |
| Micheál Carrigy | Councillor | Fine Gael | Granard |
| John Carroll | Councillor | Fianna Fáil | Nenagh |
| John Carroll | Councillor | Independent | Birr |