| Surname | Forename | Rank | Unit | Born | Resided |
| PAYNE | Charles Frederick | Rifleman | Royal Irish Rifles | Born Dublin | |
| PAYNE | Henry | Company Serjeant Major | Irish Guards | Born Burrow House, Co. Laois | |
| PEAKE | Austin | Private | Hampshire Regiment | Born St. Annes, Dublin | |
| PEAKE | Susan | Worker | Queen Mary's Army Auxiliary Corps | Born Dublin | |
| PEAKIN | Thomas | Private | Irish Guards | Born Dublin | |
| PEARCE | Frank Eugene | Private | 14th Battalion, Australian Infantry, Australian Imperial Force | Native of Dublin | |
| PEARCE | John | Company Sergeant Major | King's Own Scottish Borderers | Born Clondalkin, Dublin | Resided Dublin |
| PEARSON | William Feakes | Private | Royal Munster Fusiliers | Born Stofen Hill, Staffs. | Resided Dublin |
| PEDLOW | William | Lieutenant | 2nd Battalion, Royal Dublin Fusiliers | | |
| PEEKE | Courtney | Lance Corporal | Worcestershire Regiment | Born Dublin | Resided Newbury Port, Mass. U.S.A. |
| PEEL | Ernest | Private | Royal Army Service Corps | Born Dublin | Resided Dublin |
| PEEL | Rowland | Private | Welsh Regiment | Born Phibsboro, Co. Dublin | Resided Dublin |
| PEGGS | Isaac | Private | Connaught Rangers | Born Dublin | Resided Mullingar, Co. Westmeath |
| PEGGS | Thomas | Private | Labour Corps | Born Jobestown, Co. Dublin | Resided Jobestown |
| PELL | William | Private | Royal Dublin Fusiliers | Born Dublin | |
| PELOW | James | Private | Royal Dublin Fusiliers | Born Dublin | |
| PENDER | Patrick | Trimmer | H.M.P.M.S. "Ascot" | | |
| PENDER | John | Rifleman | Royal Irish Rifles | Born Dublin | |
| PENDER | Joseph | Private | Royal Dublin Fusiliers | Born Blackrock, Co. Dublin | Resided Blackrock |
| PENNEFATHER | Reverend Somerset Edward | Chaplain 2nd Class (Prebendary) | Army Chaplains' Dept. | | |
| PENNY | Albert William | Lance Corporal | Duke of Edinburgh's (Wiltshire Regiment) | Born BradfordonAvon, Wilts | Resided Dublin |
| PERKINS | William Edward | Rifleman | King's Royal Rifle Corps | Born Dublin | |
| PERRIN | Thomas Frood | Lieutenant | 3rd Battalion, Royal Irish Regiment | | |
| PERRY | Frank | Private | Irish Guards | Born Blackrock, Co. Dublin | |
| PERRY | George | Corporal | Royal Dublin Fusiliers | Born Sandford, Co. Dublin | |
| PHANNING | Joseph | Private | Connaught Rangers | Born Dublin | Resided Dublin |
| PHELAN | Daniel | Sergeant | Prince of Wales's Volunteers (South Lancashire Regiment) | Born Dublin | Resided Dublin |
| PHELAN | Francis A. | Private | Irish Guards | Born Dublin | |
| PHELAN | James | Private | Irish Guards | Born Dublin | |
| PHELAN | James | Strapper | Royal Army Service Corps | Born Dublin | Resided Dublin |
| PHELAN | Joseph | Corporal | Royal Dublin Fusiliers | Born Saggart, Co. Dublin | Resided Rathcoole, Co. Dublin |
| PHELAN | Joseph | Private | Royal Army Service Corps | Born St. James, Dublin | Resided Rathpoole, Co. Dublin |
| PHELAN | Patrick | Private | Royal Irish Regiment | Born Dublin | |
| PHELAN | Patrick | Sergeant | Prince of Wales's Volunteers (South Lancashire Regiment) | Born Dublin | Resided Dublin |
| PHELAN | Thomas | Private | Royal Irish Regiment | Born St. Kevin's, Dublin | |
| PHIBBS | Thomas | Private | Irish Guards | Born Dublin | |
| PHILLIPS | Andrew | Sailor | S.S. "William Middleton" (Sunderland) | Born at Wicklow | |
| PHILLIPS | Thomas | Greaser | S.S. "Cork" (Dublin) | Born in Dublin | |
| PHILLIPS | Patrick | Private | Royal Dublin Fusiliers | Born Dublin | |
| PHILLIPS | Thomas | Private | Royal Irish Regiment | Born St. Pauls, Dublin | |
| PHILLIPS | William | Private | Black Watch (Royal Highlanders) | Born Lucan, Co. Dublin | |
| PHOENIX | James | Driver | Royal Army Service Corps | Born Dublin | Resided Dublin |
| PHOENIX | Michael | Private | Prince of Wales's Leinster Regiment (Royal Canadians) | Born Ballybough, Co. Dublin | |
| PICTON | Bernard | Private | Connaught Rangers | Born Dublin | Resided Dublin |
| PIDGEON | George | Private | Royal Dublin Fusiliers | Born Dublin | |
| PIDGEON | Henry | Private | Duke of Cambridge's Own (Middlesex Regiment) | Born Dublin, Ireland | Resided Dublin |
| PIERCE | James | Private | Royal Dublin Fusiliers | Born Dublin | |
| PIERCE | Thomas | Private | Household Cavalry and Cavalry of the Line (including Yeomanry) | Born Navan | Resided Dublin |
| PIGOTT | David John | Private | Loyal North Lancashire Regiment | Born Dublin | Resided Brixton, Sussex |
| PIGOTT | Henry Bartholomew | Private | Royal Dublin Fusiliers | Born Dublin | |