| Surname | Forename | Rank | Unit | Born | Resided |
| COOMBES | John | Private | Connaught Rangers | Born Dublin | Resided Crumlin, Co. Dublin |
| COOMBES | Martin | Acting Company Sergeant Major | Royal Dublin Fusiliers | Born Dublin | |
| COOMBS | Henry George | Private | Dorsetshire Regiment | Born Dublin | |
| COOMBS | William Thomas | Regimental Sergeant Major | Royal Horse Artillery and Royal Field Artillery | Born Dublin | |
| COONAN | Jonathan | Private | Leinster Regiment | | |
| COONEY | E L | Second Lieutenant | 9th Battalion, Royal Dublin Fusiliers | | |
| COONEY | Christopher | Sergeant | Royal Dublin Fusiliers | Born Dublin | |
| COONEY | James | Private | Royal Dublin Fusiliers | Born Dublin | |
| COONEY | Michael | Private | Royal Dublin Fusiliers | Born Dublin | |
| COONEY | Thomas | Private | Manchester Regiment | Born Dublin | |
| COOPER | Maurice Lea | Captain | B Flight 213th Squadron Royal Air Force | | |
| COOPER | Alfred | Private | Royal Inniskilling Fusiliers | Born Ballbriggan, Co. Dublin | Resided Bray |
| COOPER | Edwin | Private | Queen's Own (Royal West Kent Regiment) | Born Dublin, Iroland | Resided Yalding, Kent |
| COOPER | Henry | Sergeant | Royal Fusiliers (City Of London Regiment) | Born St. Kevin, Dublin | Resided Chichester |
| COOPER | James | Private | Royal Dublin Fusiliers | Born Dublin | |
| COOPER | John | Private | Royal Dublin Fusiliers | Born Dublin | |
| COOPER | Laurence | Private | Royal Dublin Fusiliers | Born Dun Laoghaire, Co. Dublin | |
| COOTE | Robert Theopolis | Sergeant Major | 205th Battalion, Canadian Infantry | | |
| COOTE | Charles | Private | Household Cavalry and Cavalry of the Line (including Yeomanry) | Born Harolds Cross, Peebles | Resided Dublin |
| COOTE | R. T. | Sergeant Major | Irish Guards | | |
| COPE | John | Private | Royal Dublin Fusiliers | Born Dublin | |
| COPE | Thomas | Private | Princess Victoria's (Royal Irish Fusiliers) | Born Dublin | |
| CORBALLY | Patrick | Private | Royal Dublin Fusiliers | Born Terenure, Co. Dublin | Resided Terenure |
| CORBETT | Jeremiah | Recruit | Corps of Royal Engineers | Born Dublin | |
| CORCORAN | J B | Private | 14th Battalion, Canadian Infantry (Quebec Regiment) | | |
| CORCORAN | Patrick | Cattleman | S.S. "Adela" (Dublin) | Born at Castledermot, Co. Kildare | |
| CORCORAN | William | Lance Corporal | Irish Guards | Born Athy, Co. Kildare | Resided Dublin |
| CORCORAN | John | Private | Royal Irish Regiment | Born Rathmines, Co. Dublin | Resided Dun Laoghaire, CoDublin |
| CORCORAN | John Joseph | Driver | Royal Horse Artillery and Royal Field Artillery | Born Dublin, Ireland | |
| CORCORAN | Patrick | Lance Corporal | Royal Dublin Fusiliers | Born Dublin | Resided Dublin |
| CORCORAN | William | Private | Duke of Cambridge's Own (Middlesex Regiment) | Born Harolds Cross, Dublin | |
| CORLETT | Arthur | Driver | Royal Horse Artillery and Royal Field Artillery | Born Dublin | |
| CORLEY | James | Private | Royal Dublin Fusiliers | Born Dublin | |
| CORONER | Joseph | Private | Royal Dublin Fusiliers | Born Dublin | |
| COROORAN | Arthur | Rifleman | Royal Irish Rifles | Birthplace unknown | Resided Blackrock, Co. Dublin |
| CORR | John | Sergeant | Royal Dublin Fusiliers | Born Glenamady, Galway | Resided Inchicore, Dublin |
| CORR | Christopher | Gunner | Royal Garrison Artillery | Born Kingsdown, Co. Dublin | |
| CORR | John | Lance Corporal | Royal Dublin Fusiliers | Born Dublin | Resided Dublin |
| CORR | Simon | Private | Irish Guards | Born Glasnevin, Co. Dublin | Resided Chester, Ches. |
| CORR | Thomas | Lance Sergeant | Duke of Cambridge's Own (Middlesex Regiment) | Born Rathmines, Dublin | |
| CORR | William | Private | King's Own (Royal Lancaster Regiment) | Born Dublin | |
| CORRI | John Stephen | Private | Royal Irish Regiment | Born St. Andrew's, Dublin | |
| CORRIGAN | John | Gunner | Canadian Field Artillery | | |
| CORRIGAN | Christopher | Private | Manchester Regiment | Born St. Josephs, Dublin | |
| CORRIGAN | James | Private | Royal Dublin Fusiliers | Born Dublin | |
| CORRIGAN | John | Private | Royal Dublin Fusiliers | Born Dublin | |
| CORRIGAN | Joseph | Lance Corporal | Royal Dublin Fusiliers | Born Dublin | |
| CORRIGAN | Michael | Private | East Yorkshire Regiment | Born Dublin | |
| CORRIGAN | Patrick | Private | Irish Guards | Born Dublin | |
| CORRY | Alexander | First Engineer (Engr. Lieutenant Royal Navy Reserve) | S.S. "W. M. Barkley" (Belfast) | Born at Belfast | |