| Name | Position | Party | Constituency |
|---|---|---|---|
| Frank Cronin | Former Representative | Renua Ireland | |
| Avril Cronin | Councillor | Fine Gael | Baltinglass |
| Tom Cronin | Councillor | Fianna Fáil | Dungarvan |
| Brendan Cronin | Councillor | Independent | Killarney |
| Réada Cronin | Former Representative | Sinn Féin | |
| Gabriel Cronnelly | Councillor | Sinn Féin | Athenry-Oranmore |
| Tom Crosby | Councillor | Independent | Boyle |
| Terry Crossan | Councillor | Unknown | Buncrana |
| Nicholas Crossan | Councillor | Independent | Buncrana |
| John Crosse | Councillor | Fine Gael | Cashel-Tipperary |
| John Crowe | Councillor | Fine Gael | Shannon |
| Jackie Crowe | Former Representative | Sinn Féin | |
| Michael John Crowe | Councillor | Fianna Fáil | Galway City East |
| Cathal Crowe | Councillor | Fianna Fáil | Shannon |
| Declan Crowe | Former Representative | Independent | |
| Seán Crowe | TD | Sinn Féin | Dublin South-West |
| Ollie Crowe | Councillor | Fianna Fáil | Galway City Central |
| Vivienne Crowley | Former Representative | Fianna Fáil | |
| Brian Crowley | Former Representative | Fianna Fáil | |
| Joe Crowley | Former Representative | Fianna Fáil | |
| Willie Crowley | Former Representative | Unknown | |
| John Crown | Former Representative | Independent | |
| Neil Cruise | Councillor | Fine Gael | Swinford |
| Mike Cubbard | Councillor | Independent | Galway City Central |
| Jim Cuddy | Councillor | Independent | Athenry-Oranmore |
| Jennifer Cuffe | Former Representative | Fianna Fáil | |
| Ciarán Cuffe | MEP | Green Party | Dublin |
| Jennifer Cuffe | Former Representative | Fianna Fáil | |
| Richie Culhane | Former Representative | Fine Gael | |
| Thomas Cullen | Former Representative | Independent |