| Name | Position | Party | Constituency |
|---|---|---|---|
| Rose Conway Walsh | TD | Sinn Féin | Mayo |
| John Coonan | Councillor | Fianna Fáil | Kilkenny |
| Donna Cooney | Councillor | Unknown | Clontarf |
| Joe Cooney | Councillor | Fine Gael | Killaloe |
| Freddie Cooper | Councillor | Unknown | Blanchardstown - Mulhuddart |
| Edel Corrigan | Councillor | Sinn Féin | Dundalk Carlingford |
| Melanie Corrigan | Councillor | Unknown | Bray West |
| Joe Costello | Councillor | Labour | North Inner City |
| Patrick Costello | TD | Green Party | Dublin South-Central |
| Teresa Costello | Councillor | Fianna Fáil | Tallaght Central |
| John Costelloe | Councillor | Sinn Féin | Limerick City North |
| Martin Coughlan | Councillor | Unknown | Macroom |
| Gillian Coughlan | Councillor | Fianna Fáil | Bandon-Kinsale |
| Simon Coveney | TD | Fine Gael | Cork South-Central |
| Barry Cowen | TD | Fianna Fáil | Laois-Offaly |