| Surname | Forename | Rank | Unit | Born | Resided |
| LEASK | James Cunliffe | Captain | Northumberland Fusiliers | | Dublin. Also Newcastle-on-Tyne |
| LEAVY | Edward | Rifleman | Royal Irish Rifles | Born Dublin | |
| LEAVY | James | Private | Royal Army Medical Corps | Born Dublin | |
| LEAVY | Michael | Rifleman | Royal Irish Rifles | Born Dublin | |
| LEBAS | Albert Henry | Lance Corporal | Royal Irish Rifles | Born Dublin | Resided Dublin |
| LEDDON | Joseph | Gunner | Royal Horse Artillery and Royal Field Artillery | Born St. Catherine's, Dublin | |
| LEDGWIDGE | Patrick | Private | Royal Inniskilling Fusiliers | Born Dublin | Resided Dublin |
| LEDWIDGE | Frank | Private | Royal Dublin Fusiliers | Born Dublin | |
| LEDWIDGE | John | Private | Royal Dublin Fusiliers | Born Dublin | |
| LEDWIDGE | Michael | Private | Royal Dublin Fusiliers | Born Dublin | |
| LEE | Frederick John | Company Sergeant Major | 19th Battalion, Australian Infantry, Australian Imperial Force | | |
| LEE | C | Fireman | S.S. "Lux" (London) | Born in Dublin | |
| LEE | Henry | Lieutenant | 1st Battalion, Royal Inniskilling Fusiliers | | |
| LEE | Joseph Bagnall | Lieutenant | 6th Battalion, Royal Munster Fusiliers | | |
| LEE | Robert Ernest | Captain | Royal Army Medical Corps | | |
| LEE | David | Gunner | Royal Garrison Artillery | Born St. Agatha, Dublin | |
| LEE | Denis | Rifleman | Royal Irish Rifles | Born Dublin | |
| LEE | Joseph | Private | Prince of Wales's Leinster Regiment (Royal Canadians) | Born at Belfast | |
| LEE | Joseph | Private | Connaught Rangers | Born Dublin | Resided Dublin |
| LEE | Michael | Private | Princess Victoria's (Royal Irish Fusiliers) | Born Dublin | |
| LEE | Patrick J. | Lance Corporal | Irish Guards | Born Dublin | Resided Dublin, Co. Dublin |
| LEE | Richard | Private | Connaught Rangers | Born Dublin | Resided Quarries, Co. Dublin |
| LEE | William | Private | Royal Dublin Fusiliers | Born Dublin | |
| LEE | John | Private | Royal Dublin Fusiliers | Born Manchester | Resided Dublin |
| LEECH | Herbert Charles | Private | Royal Dublin Fusiliers | Born Portobello, Dublin | |
| LEECH | James | Private | Royal Dublin Fusiliers | Born Dublin | |
| LEECH | James | Lance Corporal | Royal Irish Rifles | Born Dublin | |
| LEECH | Timothy | Private | Connaught Rangers | Born Dublin | Resided Dublin |
| LEECH | William | Private | Prince of Wales's Leinster Regiment (Royal Canadians) | Born Dublin | Resided Dublin |
| LEECHMAN | Robert James | Lance Corporal | 52nd Battalion, Australian Infantry, Australian Imperial Force | | |
| LEESON | Sidney James | Lance Corporal | King's Own (Royal Lancaster Regiment) | Born Dublin | |
| LEIGH | Percy Lempriere | Captain | 29th Siege Battery, Royal Garrison Artillery | Born at Sandycove, Dún Laoghaire, Co. Dublin | |
| LELAND | John Henry Frederick | Second Lieutenant | 5th Battalion, Royal Welsh Fusiliers | | |
| LEMASS | Herbert Justin | Second Lieutenant | 2nd Battalion, Royal Dublin Fusiliers | | |
| LEMON | David Wardlaw | Second Lieutenant | 7th Battalion, Leinster Regiment | | 2, Winton Avenue, Rathgar, Dublin |
| LEMON | Gilbert M. | Private | Royal Dublin Fusiliers | Born Rathfarnham, Co. Dublin | 2, Winton Avenue, Rathgar, Dublin |
| LENEHAN | Paul | Private | Royal Dublin Fusiliers | Born Dublin | |
| LENNANE | Frank | Private | Royal Warwickshire Regiment | Born Clare | Resided Dublin |
| LENNON | Patrick | Private | 3rd Regiment South African Infantry | | |
| LENNON | Charles | Private | Royal Dublin Fusiliers | Born Clontarf, Co. Dublin | |
| LENNON | James | Private | Connaught Rangers | Born Dublin | Resided Dublin |
| LENNON | Patrick | Private | Prince Of Wales's Leinster Regiment (Royal Canadians) | Born Dublin | |
| LENNON | Philip | Private | Irish Guards | Born Dublin | |
| LENNON | Thomas | Private | Royal Dublin Fusiliers | Born Dublin | |
| LENNOX | George | Private | Irish Guards | Born Dublin | |
| LENOX-CONYNGHAM | Hubert Maxwell | Major (Brevet Lieutenant Colonel) | Army Veterinary Corps | Born in Dublin | |
| LENTAIGNE | Victor Aloysius | Second Lieutenant | 2nd Battalion, Connaught Rangers | | |
| LEONARD | Patrick | Able Seaman | S.S. "Aylevarroo" (Limerick) | Born at Rush | |
| LEONARD | James | Private | Princess Victoria's (Royal Irish Fusiliers) | Born Dun Laoghaire, Co. Dublin | |
| LEONARD | James | Private | Prince of Wales's Leinster Regiment (Royal Canadians) | Born Dublin | Resided Dublin |