| Name | Position | Party | Constituency |
|---|---|---|---|
| Donal Corcoran | Former Representative | Renua Ireland | |
| Marcella Corcoran Kennedy | TD | Fine Gael | Offaly |
| Edel Corrigan | Councillor | Sinn Féin | Dundalk Carlingford |
| Melanie Corrigan | Councillor | Unknown | Bray West |
| Joe Costello | Councillor | Labour | North Inner City |
| David Costello | Former Representative | Fianna Fáil | |
| Patrick Costello | Councillor | Green Party | Kimmage - Rathmines |
| Teresa Costello | Councillor | Unknown | Tallaght Central |
| John Costelloe | Councillor | Sinn Féin | Limerick City North |
| Martin Coughlan | Councillor | Unknown | Macroom |
| Gillian Coughlan | Councillor | Fianna Fáil | Bandon-Kinsale |
| Nicky Coules | Former Representative | People Before Profit Alliance | |
| Simon Coveney | TD | Fine Gael | Cork South-Central |
| Barry Cowen | TD | Fianna Fáil | Offaly |
| Jerry Cowley | Former Representative | Independent | |
| Maeve Cox | Former Representative | Independent | |
| Gerry Coyle | Councillor | Fine Gael | West Mayo |
| Seamus Coyle | Councillor | Fianna Fáil | Ballybay-Clones |
| Donal Coyle | Councillor | Fianna Fáil | Letterkenny |
| Liam Coyne | Former Representative | Social Democrats | |
| Gerard Craughwell | Senator | Independent | Labour Panel |
| Gerry Crawford | Councillor | Fianna Fáil | Lifford-Stranorlar |
| Mags Crean | Councillor | Unknown | Greystones |
| Michael Creaton | Former Representative | Fine Gael | |
| Michael Creed | TD | Fine Gael | Cork North-West |
| Michael Creed | Councillor | Fine Gael | Macroom |
| Lucinda Creighton | Former Representative | Renua Ireland | |
| Henry Cremin | Councillor | Sinn Féin | Cork City South-West |
| Noel Cribbin | Councillor | Independent | Edenderry |
| John Cribbin | Councillor | Fine Gael | Claremorris |