| Surname | Forename | Rank | Unit | Born | Resided |
| CORRY | W | Able Seaman and Quartermaster | S.S. "Falaba" (Liverpool) | Born in Dublin | |
| CORRY | Thomas | Private | Highland Light Infantry | Born Dublin | Resided Dublin |
| COSGRAVE | Daniel Joseph | Acting Corporal | Prince of Wales's Volunteers (South Lancashire Regiment) | Born Enniscorthy, Co. Wexford | Resided Dublin |
| COSGRAVE | Denis | Private | Irish Guards | Born Dublin | |
| COSGRAVE | John | Private | Princess Victoria's (Royal Irish Fusiliers) | Born Dublin | |
| COSGROVE | Richard | Private | Prince of Wales's Leinster Regiment (Royal Canadians) | Born Dublin | |
| COSTELLO | Edward William | Lieutenant | 3rd Battalion, Royal Inniskilling Fusiliers, attached 87th Company, Machine Gun Corps Infantry | | |
| COSTELLO | Edward | Private | Essex Regiment | Born Finglas, Dublin | Resided Woodford Green, Essex |
| COSTELLO | James | Gunner | Royal Garrison Artillery | Born St. Andrew's, Dublin | |
| COSTELLO | John | Sergeant | Royal Garrison Artillery | Born Deans, Grange, Co. Dublin | Resided Deans, Grange |
| COSTELLO | John | Private | East Yorkshire Regiment | Born Dublin | |
| COSTELLO | John | Private | Irish Guards | Born Balbriggan, Co. Dublin | |
| COSTELLO | John William | Private | Royal Dublin Fusiliers | Born Dublin | |
| COSTELLO | Patrick | Private | Royal Dublin Fusiliers | Born Dublin | |
| COSTELLO | Stephen | Private | Royal Dublin Fusiliers | Born Dublin | Resided Dublin |
| COSTELLOE | John | Private | Labour Corps | Born Dublin | |
| COSTIGAN | James | Private | Prince Of Wales's Leinster Regiment (Royal Canadians) | Born Dublin | |
| COSTIGAN | William | Private | Princess Victoria's (Royal Irish Fusiliers) | Born Dublin | Resided Salford, Manchester |
| COTES | Joseph Andrew | Corporal | Gloucestershire Regiment | Born Dublin | |
| COTTON | Edward | Private | Royal Dublin Fusiliers | Born Lusk, Co. Dublin | Resided Armagh |
| COTTRELL | Albert | Acting Corporal | Sherwood Foresters (Nottinghamshire and Derbyshire Regiment) | Born Dublin | Resided Guiseley Yorks |
| COUGHLAN | James | Private | Royal Dublin Fusiliers | Born Dublin | |
| COUGHLAN | John | Private | Royal Warwickshire Regiment | Born Pimlico, Dublin | |
| COUGHLAN | John | Private | Prince of Wales's Leinster Regiment (Royal Canadians) | Born Ballsbridge, Co. Dublin | Resided Dublin |
| COUGHLAN | Thomas | Private | Prince of Wales's Leinster Regiment (Royal Canadians) | Born Dublin | Resided Dublin |
| COUGHLIN | John | Private | Seaforth Highlanders (RossShire Buffs, The Duke Of Albany's) | Born Dublin | |
| COULAHAN | Arthur Herbert | Private | Princess Victoria's (Royal Irish Fusiliers) | Born Dublin | |
| COULSON | William | Private | Royal Inniskilling Fusiliers | Born Christchurch, Dublin | |
| COULSON | William John | Private | Royal Fusiliers (City of London Regiment) | Born Dublin | |
| COULTER | Michael | Private | Royal Dublin Fusiliers | Born Dublin | |
| COULTER | Patrick | Lance Corporal | Royal Dublin Fusiliers | Born Dublin | |
| COURTNEY | James | Private | Prince of Wales's Leinster Regiment (Royal Canadians) | Born Dublin | |
| COURTNEY | James Thomas | Company Sergeant Major | Royal Irish Rifles | Born Dublin | |
| COURTNEY | Joseph | Corporal | Royal Irish Rifles | Born Dublin | |
| COURTNEY | William | Private | Royal Dublin Fusiliers | Born Clondalkin, Dublin | |
| COUSINS | Patrick | Private | Household Cavalry and Cavalry of the Line (including Yeomanry) | Born Dublin | |
| COWAN | Sidney Edward | Captain | Royal Flying Corps | Born Downpatrick | |
| COWAN | James | Private | Prince of Wales's Own (West Yorkshire Regiment) | Born Dublin | Resided Halifax |
| COX | John Christopher | Leading Signalman | H.M.S. "Hampshire" | | |
| COX | Herbert Evelyn | Corporal | Buffs (East Kent Regiment) | Born Forest Gate, Essex | Resided Cherryfields, Foxrock, Co. Dublin |
| COX | Theodore Hector | Corporal | Buffs (East Kent Regiment) | Born Forest Gate, Essex | Resided Cherryfields, Foxrock, Co. Dublin |
| COX | Frederick | Rifleman | Rifle Brigade (The Prince Consort's Own) | Born Guildford, Surrey | Resided Blacknits, Dublin |
| COYNE | Thaddeus | Private | 8th Battalion, Australian Infantry, Australian Imperial Force | | |
| COYNE | Charles | Lance Corporal | Duke of Cambridge's Own (Middlesex Regiment) | Born Dublin | Resided Manchester |
| COYNE | James | Private | Prince of Wales's Leinster Regiment (Royal Canadians) | Born Dublin | |
| CRABBS | Edwin Arthur | Private | Hampshire Regiment | Born Irish Town, Dublin | |
| CRAIG | H W | Second Lieutenant | 30th Squadron Royal Flying Corps and Royal Engineers | Born at Bray Co. Wicklow | |
| CRAIG | John Henry | Private | Royal Welsh Fusiliers | Born Dublin | |
| CRAIG | Peter | Private | Royal Dublin Fusiliers | Born Palmerstown, Co. Dublin | |
| CRAIG | William | Private | Royal Dublin Fusiliers | Born Chapelizod, Co. Dublin | |