| Name | Position | Party | Constituency |
|---|---|---|---|
| Shane Cassells | TD | Fianna Fáil | Meath West |
| Marie Casserly | Councillor | Unknown | Sligo-Drumcliff |
| Marie Casserly | Former Representative | Independent | |
| Vicki Casserly | Councillor | Fine Gael | Lucan |
| Eugene Cassidy | Councillor | Fine Gael | Kells |
| Alan Anthony Cassidy | Former Representative | Sinn Féin | |
| John Cassin | Councillor | Sinn Féin | Carlow |
| John Caulfield | Councillor | Fianna Fáil | Swinford |
| Mary Cavanagh | Councillor | Fine Gael | Castlecomer |
| Bill Chambers | Councillor | Fianna Fáil | West Clare |
| Jack Chambers | TD | Fianna Fáil | Dublin West |
| Lisa Chambers | TD | Fianna Fáil | Mayo |
| James Charity | Councillor | Independent | Athenry-Oranmore |
| Alan Cheevers | Councillor | Unknown | Galway City East |
| Nessa Childers | Former Representative | Independent | |
| Hazel Chu | Councillor | Unknown | Pembroke |
| Clare Claffey | Councillor | Social Democrats | Birr |
| Aine Clancy | Former Representative | Labour | |
| TJ Clare | Former Representative | Independent | |
| Michael Clark | Councillor | Unknown | Killiney-Shankill |
| Sorca Clarke | Former Representative | Sinn Féin | |
| Michael Clarke | Councillor | Independent | Ballymote-Tubbercurry |
| Paul Clarke | Former Representative | Independent | |
| Bill Clear | Councillor | Unknown | Naas |
| Peter Cleere | Councillor | Fianna Fáil | Callan-Thomastown |
| John Clendennen | Councillor | Fine Gael | Birr |
| Shane Clifford | Former Representative | Fianna Fáil | |
| Lorraine Clifford-Lee | Senator | Fianna Fáil | Cultural and Educational Panel |
| Thomas Clonan | Former Representative | Independent | |
| Ollie Clooney | Councillor | Unknown | Borris in Ossory-Mountmellick |