| Number | Full Name | Qualifying Premises | Description of Service, Ships, Regiment, Number, Rank, Rating, &c, or recorded address | Ward / Polling District |
| 11267 | OAKES, Charles | 94 Skeffington Road | (blank) | Ribbleton / W |
| 11268 | OAKES, John Henry | 94 Skeffington Road | 57086 Pte., 1/7 K. L'pool | Ribbleton / W |
| 2547 | OAKEY, George Henry | 30 Bolton Street | 902080 Gunr., "B," 337 R.F.A. | Christ Church / F |
| 2088 | OAKEY, Harry | 40 Euston Street | 123326 Pte., 8th Training Bn., R.A.M.C. | Christ Church / E |
| 3071 | OAKEY, Robert Henry | 3 Sea View, Tulketh Road | 106005 Gnr., 39th A.A. Co., R.G.A. | Ashton / G |
| 8508 | OAKLEY, George | 13 Sefton Street | 482150 Pte., 424 Agric. Lab. Coy. | Trinity / R |
| 8890 | OAKLEY, Joseph | 10 Jutland Street | 23877 Cpl., R.E. | Trinity / S |
| 8889 | OAKLEY, Thomas Percy | 10 Jutland Street | 359649 Pte , King's Lpl Scots | Trinity / S |
| 2796 | O'BOYLE, Thomas | 4 Seed Street | 148361 3rd Air-Mech., 24 Training Squad, R.A.F. | Christ Church / F |
| 8762 | O'BRIAN, Edmund | 7 Egan Street | (blank) | Trinity / S |
| 12420 | O'BRIEN, Ernest George | 52 Lytham Road | 12196 Cpl. Border Regt. | Fulwood West / FW |
| 1103 | O'BRIEN, Hugh | 9 Richmond Street | (blank) | St John / B |
| 9491 | O'BRIEN, James | 36 Holmrook Road | 359244 Pte., Labour Corps | Deepdale / T |
| 8845 | O'BRIEN, Patrick | 11 Homer Street | 40793 Gnr. 35 Res Baty., R.F.A. | Trinity / S |
| 12113 | O'BRIEN, Thomas | 36 Sharoe Green Lane | (blank) | Fulwood Central / FC |
| 1863 | O'BRIEN, Thomas Henry | 67 Pleasant Street | 19768 Q.M.S. Lincolnshire Regt. | Avenham / D |
| 12421 | O'BRIEN, Thomas Patrick | 52 Lytham Road | (blank) | Fulwood West / FW |
| 8144 | O'BRIEN, William | 19 Elizabeth Street | 697049 Dvr., R.F.A. | Trinity / R |
| 12422 | O'BRIEN, William James | 52 Lytham Road | 75096 Sapr. R.E. (Signals) | Fulwood West / FW |
| 9565 | O'CONNELL, Francis | 36 Linnett Street | 96261 B.S.M., R.F.A. | Deepdale / T |
| 11976 | O'CONNELL, James | 288 New Hall Lane | (blank) | Fishwick / Y |
| 12580 | O'CONNOR, James | 54 Byron Street | 577345 Pte., Labour Corps | St Peter / L |
| 10255 | ODDIE, John | 10 Ribbleton Street | 31570 Pte., Lancs. Fus. | Deepdale / U |
| 10256 | ODDIE, Samuel | 10 Ribbleton Street | 61041 2nd Pte., R.A.F. | Deepdale / U |
| 37 | ODDIE, Thomas | 81 Albert Street | 50555 Pte., 1st Suffolk Regt. | St John's / A |
| 8334 | ODDIE, Thomas Winder | 56 Lancaster Road | 680698 Gnr., R.F.A., C/315 Bge. | Trinity / R |
| 10257 | ODDIE, William | 10 Ribbleton Street | 33685 Pte., M.G.C., 52 Bn. | Deepdale / U |
| 1283 | ODDY, William Ernest | 33 Beech Street | 13427s Pte. R.M. Labour Corps | Avenham / C |
| 8855 | ODLUM, Humphrey | 2 Hopwood Street | 301433 Pte., 743 Lab. Corps | Trinity / S |
| 13777 | ODLUM, Robert | 2 Hopwood Street | 278946 2nd Pte., R.A.F. | Trinity / S |
| 10709 | O'DONNELL, James | 15 Owtram Street | 08229 Pte., 10 Sect. A.O.C. | Ribbleton / V |
| 8516 | O'DONNELL, John | 19 Snow Hill | 281896 Pnr., R.E., 29th Air Line Section | Trinity / R |
| 10038 | O'DONNELL, John | 7 Irvin Street | (blank) | Deepdale / U |
| 10547 | O'DONOGHUE, John, jnr. | 12 Dunmore Street | 65082 Pte., Welsh Regt. | Ribbleton / V |
| 864 | OGDEN, Abraham | 5 Lark Hill Road | 156198 L/Bombr., 104th, S. Baty., R.G.A. | St John / B |
| 8814 | OGDEN, David | 6 Holstein Street | 697050, R.F.A., 55 Div., T.M.B. | Trinity / S |
| 600 | OGDEN, Henry | 22 Brewery Street | 516184 Pte., Labour Corps | St John / B |
| 11423 | OGDEN, James | 224 Brockholes View | 174491 Gnr. 126th Baty. R.G.A. | Fishwick / X |
| 1674 | OGDEN, John | 37 Chaddock Street | 90910 Pt. 125th Labour Corps | Avenham / D |
| 11424 | OGDEN, John | 224 Brockholes View | 322276 Sapper I.T.W.D. R.E. Richborough | Fishwick / X |
| 1 | OGDEN, William | 2 Albert Street | 28350 Pte., K.S.L.I. | St John's / A |
| 1310 | O'GRADY, Daniel | 14 Brixey Street | 31902 Sergt. L.N.L. | Avenham / C |
| 8535 | O'GRADY, Thomas | 17 Tenterfield Street | 29370, R.D.F. | Trinity / R |
| 2754 | O'HARA, Edward Kelly | 8 Redcross Street | 22356 Pte., L.N.L. | Christ Church / F |
| 694 | O'HARA, James | 23 Duke Street | (blank) | St John / B |
| 2755 | O'HARA, William Kelly | 8 Redcross Street | 245461 Pte, Devons | Christ Church / F |
| 5649 | O'KANE, John Patrick | 54 Brackenbury Road | 3097 Tpr., 1st Guards, M.G.C. | Moorbrook / M |
| 7862 | O'KELL, Harold | 217 North Road | 446670 Spr., R.E., 439 Fld. Coy. | Park / Q |
| 12669 | OLDFIELD, Arthur | 7 Moss Rose Street | 196536 Pte., 4/4 L.N.L. | St Peter / L |
| 10834 | OLDFIELD, John | 41 Wilbraham Street | 148913 Pte., M.G.C. | Ribbleton / V |
| 10835 | OLDFIELD, Thomas | 41 Wilbraham Street | (blank) | Ribbleton / V |
| 13618 | OLDHAM, Thomas | 97 Meadow Street | 26648 Pte., 9th E. Surrey Regt. | Park / P |
| 10190 | O'LEARY, Richard | 63 Ribbleton Avenue | 107582 Pte., M.G.C. | Deepdale / U |
| 3491 | OLIVER, Charles James | 5 Tulketh Road | (blank) | Ashton / H |
| 3492 | OLIVER, Walter Geoffrey | 5 Tulketh Road | 200312 Fitter, B. Bn., 75th Bde., R.F.A. | Ashton / H |
| 7497 | OLIVER, William | 207 St. Paul's Road | 52477 Sgt., R.W. Fus., 9th Bn. | Park / P |
| 4176 | OLLERENSHAW, James William | 6 Ashton Street | 209051 A.B., H.M.S. "Folkestone" | Maudland / J |
| 5265 | OLLERTON, George | 45 Brougham Street | 101187 Pte., Lab. Co. | St Peter / L |
| 6498 | OLLERTON, Joseph | 27 Butler Place | 12475 Pte., 9th Border Regt. | Park / O |
| 6499 | OLLERTON, Richard | 27 Butler Place | 366079, (87 Class) R.E., 581 Fort Co. | Park / O |
| 8742 | OLLERTON, Thomas | 12 Edgar Street | 14185 Sgt., L.N.L., 1st Bn. | Trinity / S |
| 9176 | OLLERTON, William | 53 Spring Gardens | W.R. 21477 Pnr., R.E. | Trinity / S |
| 522 | OLVER, Charles | 1a Albyn Bank Street | 2nd Lieut., Border Regt. | St John / B |
| 10118 | O'MELIA, James | 28 Morgan Street | 126184 Pte., R.A.M.C., 60 Genl. Hospl. | Deepdale / U |
| 1609 | O'NEIL, James Francis | 20 Brunswick Street | J33141 A.B. R.N. | Avenham / D |
| 13083 | O'NEIL, Joseph | 20 Brunswick Street | 656384 Pte., 23 London Regt. | Avenham / D |
| 2430 | O'NEIL, Joseph Edmond | 18 Spring Bank | (blank) | Christ Church / E |
| 1086 | O'NEIL, Richard | 132 Queen Street | R/236429 Pte., A.S.C. | St John / B |
| 3431 | O'NEILL, Charles | 39 Spa Road | 352329 9th Manch. Regt. | Ashton / H |
| 3432 | O'NEILL, Daniel | 39 Spa Road | 10709 Sgt., 2nd Scots Guards | Ashton / H |
| 11839 | O'NEILL, Harry | 18 William Henry Street | 10172 Private R.A.M.C. | Fishwick / X |
| 3433 | O'NEILL, John | 39 Spa Road | 201075 2/4th L. North Lancs. | Ashton / H |
| 5596 | O'NEILL, John | 120 Victoria Street | 2nd-Lieut., Devon | St Peter / L |
| 8212 | O'NEILL, John | 17 Higginson Street | M/339952 Dr., A.S.C., 7 Aux. Steam Coy. | Trinity / R |
| 5184 | O'NEILL, Joseph Francis | 43 Ashmoor Street | WR/331050 Spr., I.W. & D., R.E. | St Peter / L |
| 5740 | O'NEILL, Richard | 120 Elliott Street | 686080 Dvr., R.F.A. | Moorbrook / M |
| 10108 | O'NEILL, Thomas | 12 Morgan Street | (blank) | Deepdale / U |
| 9129 | ORDNELL, Humphrey | 38 St Paul's Square | (blank) | Trinity / S |
| 5224 | O'REILLY, James Francis | 66 Bedford Street | 11830 Pte., Yorks. Dragoons | St Peter / L |
| 2262 | ORMEROD, Edward | 151 Marsh Lane | 538 C.S.M., Army Gym. Staff | Christ Church / E |
| 5783 | ORMEROD, George | 89 Henderson Street | 43164 Pnr., 72nd Field Co., R.E. | Moorbrook / M |
| 9780 | ORMEROD, George | 19 Andrew Street | G/1286 Rfmn., R.I.R. | Deepdale / U |
| 4198 | ORMEROD, James | 2 Bentinck Street | 23565 Pte., 6th L.N.L. | Maudland / J |
| 5784 | ORMEROD, James | 89 Henderson Street | 7th Royal W. Kents | Moorbrook / M |
| 11971 | ORMEROD, Peter | 216 New Hall Lane | 34823 Pte. 2nd R.F.S Infantry, A. Coy. Horse Transport | Fishwick / Y |
| 4818 | ORMEROD, Robert | 87 Greenbank Street | 136182 Gnr., 18th Div. Amm. Column, R.F.A. | St Peter's / K |
| 12651 | ORMEROD, William James | 2 Mill Hill | Devenport Division | St Peter / L |
| 12682 | ORMERWOOD, Peter | 19 Nelson Street | 56022 Dvr., R.F.A., B/66 Bde. | St Peter / L |
| 5419 | ORMERWOOD, Thomas | 84 Haydock Street | WR/25403, 337 Road Con. Coy., R.E. | St Peter / L |
| 2233 | ORMSON, Forrester Hewan | 38 Langton Street | 3471 A/Cpl., A.P.C. | Christ Church / E |
| 11357 | ORRELL, Arthur | 3 Ashleigh Street | 229675 Gunner R.F.A., 108/23th Bgde. | Fishwick / X |
| 95 | ORRELL, Robert | 5 Blelock Street | 227706 Pte., East Lancs. Regt. | St John's / A |
| 10265 | ORRELL, Robert | 9 St. Mary's Street North | 22770 Pte., E. Lancs., 6th Bn. | Deepdale / U |
| 11042 | ORTON, Harold | 2 Miller Road | 11406 Pte., E. Surrey Regt. | Ribbleton / W |
| 714 | OSBALDESTON, Henry | 69 Duke Street | 201764 Pte., 1st L. North Lancs. | St John / B |
| 5379 | OSBALDESTON, John | 45 Harrington Street | (blank) | St Peter / L |
| 9507 | OSBALDESTON, John | 86 Holmrook Road | 19268 3rd A.M., R.A.F. | Deepdale / T |
| 1728 | OSBALDESTON, Joseph | 5 Garden Street | 19343 Pt. 6th Batt. L.N.L. | Avenham / D |
| 4266 | OSBALDESTON, Josiah | 35 Fleetwood Street | H.M.S. "Basilish" | Maudland / J |
| 13575 | OSBALDESTON, Thomas | 1 Alma Street | 213352 Gr., D/245 Bde. R.F.A. | Park / P |
| 985 | OSBORN, Edwin | 37 Malt Street | (blank) | St John / B |
| 986 | OSBORN, Frank | 37 Malt Street | 93889 Pte., 4th Mach. Gun Corps | St John / B |
| 11487 | OSBORNE, Harry | 5 Disraeli Street | 363288 A/Cpl. R.G.A. | Fishwick / X |
| 10074 | O'SHEA, William | 53 Isherwood Street | 39272, E. Lancs. | Deepdale / U |
| 10311 | O'SHEA, William | 169 Skeffington Road | 39372 Pte., E. Lancs, 9th Bn. | Deepdale / U |
| 10725 | OSWELL, John Frederick | 116 Ribbleton Lane | M/344839 Pte, 594 Coy., A.S.C. | Ribbleton / V |
| 11747 | OTLEY, Charles | 4 Primrose Hill | (blank) | Fishwick / X |
| 8168 | OWEN, James | 135 Friargate | M2/046314 Pte., A.S.C., 906 Coy. | Trinity / R |
| 11538 | OWEN, John | 9 Fishwick Road | 19035 Sergt. R.D.C. 311th Protection Company | Fishwick / X |
| 7746 | OWENS, Edward | 13 Fish Street | 2028 Dvr., A/165 Bge., R.F.A. | Park / Q |
| 1356 | OWENS, Ernest Edgar | 16 Connaught Road | (blank) | Avenham / C |
| 8225 | OWENS, Robert | 50 Higginson Street | 8192 Pte., K.O.R. Lancs. | Trinity / R |
| 2952 | OWENS, William Thomas | 3 Oswald Road | 19078 Pte., 312 Co., R.D.C. | Ashton / G |
| 11618 | OXENDALE, Sidney G. | 7 Lex Street | 131503 Bdr. R.G.A., 424 Siege Battery | Fishwick / X |
| 3951 | OXFORD, Patrick | 71 Old Lancaster Lane | (blank) | Maudland / I |
| 8293 | OXLEY, George Henry | 11 Jennett Street | 48824 Pte., 2nd Garr. Bn., Northumberland Fus. | Trinity / R |
| 13151 | OXLEY, George Henry | 13 Lodge Street | 48824 Pte., North. Fus. | Christ Church / E |