| Surname | Forenames | Relation to Head | Marital Status | Age | Occupation | Birthplace | Census | Address | Reference | Source | Other Information |
| Laffan | Patrick | | | 56 | | Ireland | 1851 | NTT Worksop | 2122/008 | | |
| Lagen | James | Visitor | Unmarried | 30 | Alkali Labourer | Ireland | 1851 | | East Jarrow, Co. Durham | | 101 |
| Langin | Bridget | Wife | Married | 37 | | Ireland | 1851 | Alnwick, Northumberland | HO 107/2419 folio 517 | NDFHS | |
| Langin | Elenor | Daughter | Unmarried | 18 | House servant | Ireland | 1851 | Alnwick, Northumberland | HO 107/2419 folio 517 | NDFHS | |
| Langin | Martin | Son | | 10 | Scholar | Ireland | 1851 | Alnwick, Northumberland | HO 107/2419 folio 517 | NDFHS | |
| Langin | Mary | Daughter | | 3 | | Wooler, Northumberland | 1851 | Alnwick, Northumberland | HO 107/2419 folio 517 | NDFHS | |
| Langin | Peter | Head | Married | 54 | agricultural labourer | Ireland | 1851 | Alnwick, Northumberland | HO 107/2419 folio 517 | NDFHS | |
| Langin | Peter | Son | | 8 | | Ireland | 1851 | Alnwick, Northumberland | HO 107/2419 folio 517 | NDFHS | |
| Langin | Thomas | Son | Unmarried | 15 | agricultural labourer | Ireland | 1851 | Alnwick, Northumberland | HO 107/2419 folio 517 | NDFHS | |
| Laulas? | James | Son | | 7 | | Halifax, Yorks | 1881 | 31 Old Lee Road, Ovenden, Halifax | Halifax, West Yorkshire, Film No. 1342056, RG 11/4419, folio 62, page 10 | Calderdale FHS | |
| Laulas? | John | Head | Married | 33 | Mason's Labourer | Co Sligo | 1881 | 31 Old Lee Road, Ovenden, Halifax | Halifax, West Yorkshire, Film No. 1342056, RG 11/4419, folio 62, page 10 | Calderdale FHS | |
| Laulas? | Joseph | Son | | 5 | | Halifax, Yorks | 1881 | 31 Old Lee Road, Ovenden, Halifax | Halifax, West Yorkshire, Film No. 1342056, RG 11/4419, folio 62, page 10 | Calderdale FHS | |
| Laulas? | Sarah | Wife | | 36 | | Co Meath | 1881 | 31 Old Lee Road, Ovenden, Halifax | Halifax, West Yorkshire, Film No. 1342056, RG 11/4419, folio 62, page 10 | Calderdale FHS | |
| Lawless | Bridget | Visitor | | 55 | Housekeeper | Ireland | 1881 | Northowram, West Yorkshire | RG11/4421 Folio 119 Pg10 | | |
| Lawten | Margaret | Head | Widow | 56 | Shopkeeper | Cork, Ireland | 1851 | St Olave, Exeter | | | |
| Leavy | Catherine | Visitor | | 5 | scholar | Ireland | 1851 | Alnwick, Northumberland | HO 107/2419 folio 340 | NDFHS | |
| Leavy | Eleanor | Head | Married | 34 | Housewife | Ireland | 1851 | Alnwick, Northumberland | HO 107/2419 folio 340 | NDFHS | |
| Leavy | Elizabeth | Visitor | | 11 | scholar | Ireland | 1851 | Alnwick, Northumberland | HO 107/2419 folio 340 | NDFHS | |
| Leavy | Mary | Visitor | Married | 47 | | Ireland | 1851 | Alnwick, Northumberland | HO 107/2419 folio 340 | NDFHS | |
| Leavy | Mary | Daughter | Unmarried | 14 | scholar | Ireland | 1851 | Alnwick, Northumberland | HO 107/2419 folio 340 | NDFHS | |
| Leavy | Michael | Son | | 2 | | Alnwick, Northumberland | 1851 | Alnwick, Northumberland | HO 107/2419 folio 340 | NDFHS | |
| Leavy | Patrick | Visitor | | 14 | | Ireland | 1851 | Alnwick, Northumberland | HO 107/2419 folio 340 | NDFHS | |
| Leavy | Rosy | Daughter | | 8 | scholar | Ireland | 1851 | Alnwick, Northumberland | HO 107/2419 folio 340 | NDFHS | |
| Leavy | Thomas | Son | | 11 | scholar | Ireland | 1851 | Alnwick, Northumberland | HO 107/2419 folio 340 | NDFHS | |
| Lee | Henry | Father-in-law | Widower | 64 | Chelsea Pensioner | Ireland | 1851 | Doveridge Fields, Doveridge, Derbyshire | | | |
| Lee | Mary Brown | Wife | | 77 | Needlewoman | Ireland | 1851 | Fulneck, Yorks | Lister House | | |
| Leeson | Ann | | | 29 | | Ireland | 1851 | Radford | 2129/451 | Notts Strays | |
| Leeson | Patrick | | | 33 | | Ireland | 1851 | Radford | 2129/451 | Notts Strays | |
| Lenard | Philip | Lodger | Unmarried | 27 | Labourer Alkali Works | Ireland | 1851 | Heworth Shore, Heworth, Co. Durham | Page 49 (218) | | |
| Levy | Catharine | Wife | Married | 25 | | Ireland | 1851 | Belford, Northumberland | HO 107/2420 folio 14 | NDFHS | |
| Levy | Peter | Head | Married | 26 | Agricultural labourer | Ireland | 1851 | Belford, Northumberland | HO 107/2420 folio 14 | NDFHS | |
| Lewis | Family | | | | | Lancashire | 1851 | 9 Ravald Street | Manchester, HO107/2225 MF629, page 12 | | New Cross, Ancoats, St Barnabus Parish |
| Lewis | Family | | | | | Lancashire | 1851 | 9 Ravald Street | Manchester, HO107/2225 MF629, page 12 | | New Cross, Ancoats, St Barnabus Parish |
| Lewis | Family | | | | | Lancashire | 1851 | 9 Ravald Street | Manchester, HO107/2225 MF629, page 12 | | New Cross, Ancoats, St Barnabus Parish |
| Lewis | Jane | Lodger | Married | 25 | wife of Royal Marine | Woodnesborough, Kent | 1871 | 13 Gladstone Road, Deal, Kent (Home of Alls) | RG10/1003 p45 f27 sched 243 | Extracted by Ruth Nichol for coastguard index | |
| Lewis | John | Head | Married | 42 | Master Bricklayer | Lancashire | 1851 | 9 Ravald Street | Manchester, HO107/2225 MF629, page 12 | | New Cross, Ancoats, St Barnabus Parish |
| Lewis | Maria Ann | Wife | Married | 42 | | Lancashire | 1851 | 9 Ravald Street | Manchester, HO107/2225 MF629, page 12 | | New Cross, Ancoats, St Barnabus Parish |
| Liddle | Robert | Lodger | Married | 50 | Labourer | Ireland | 1851 | Berwick, Northumberland | HO 107/2421 folio 555 | | |
| Liddy | Mary | Head | Widow | 77 | Laundry worker | Ireland, Cork | 1871 | 4 Pleasant Row, Wandsworth | RG10/711 Parish: All Saints | | |
| Lilley | Edwin | Head | Married | 25 | Bricklayers labourer | England, Surrey, Wimbledon | 1871 | 12 Point Pleasant, Wandsworth | RG 10/709 | | |
| Limblin | Maria | Servant | Unmarried | 14 | Servant | Ireland | 1851 | First House, Collyhurst Road, St. Michael, Manchester | Folio 790 Sch. 43 | | |
| Lindsay | Eleanor | Daughter | | 31 | retired servant | Alnwick, Northumberland | 1851 | Alnwick, Northumberland | HO 107/2419 folio 289 | NDFHS | |
| Lindsay | Elizabeth | Wife | Married | 68 | | Waterford, Ireland | 1851 | Alnwick, Northumberland | HO 107/2419 folio 289 | NDFHS | |
| Lindsay | William | Head | Married | 76 | Chelsea pensioner | Alnwick, Northumberland | 1851 | Alnwick, Northumberland | HO 107/2419 folio 289 | NDFHS | |
| Lindsey | Elizabeth | | | 44 | | Ireland | 1851 | NTT Worksop | 2122/117 | | |
| Lindsey | Jane | | | 15 | | Ireland | 1851 | NTT Worksop | 2122/117 | | |
| Littlefield | Nora | | | 23 | | Co Dublin, Ireland | 1851 | NTT Worksop | 2122/074 | | |
| Lloyd | Arthur | | | 76 | | Ireland | 1851 | NTT Worksop | 2122/207 | | |
| Lockwood | Elizabeth | Head | Widow | 46 | Annuitant | England | 1851 | Mount Murray, Santan, Isle of Man | Santan 1851 entry 33 | Isle of Man Family History Society | |
| Lockwood | William | Son | Unmarried | 22 | | England | 1851 | Mount Murray, Santan, Isle of Man | Santan 1851 entry 33 | Isle of Man Family History Society | |
| Lodder | George T | Lodger | Unmarried | 53 | Cordwainer | Wimbourne, Dorset | 1871 | 13 Gladstone Road, Deal, Kent (Home of Alls) | RG10/1003 p45 f27 sched 243 | Extracted by Ruth Nichol for coastguard index | |
| Luche | Mary P. | Sister | Unmarried | 25 | | Ireland | 1881 | 11 Military Knights, Windsor | RG11/1325/3/4 EnumDist. 1 Folio 4 page 2 | | |
| Luxton | Elizabeth | Wife | | 30 | | Thorverton | 1851 | St . Mary Steps, Exeter, Devon | And Children | | |
| Luxton | William | Head | | 29 | Green Grocer | Newton, St Cyes? Dev. | 1851 | St . Mary Steps, Exeter, Devon | And Children | | |
| Lynch | Daniel | Lodger | Unmarried | 54 | Weaver | Ireland | 1851 | 7 Old Mount Street | Manchester HO 107/2230 MF639 | | Angel Meadow District, St Michaels Parish |
| Lyons | Michael | | Unmarried | 19 | farm labourer | Mayo, Ireland | 1891 | Norbury Hall, Norbury (part of Hazel Grove) | | | |
| Lyvan | Patrick | Visitor | Unmarried | 26 | Quarry labourer | Ireland | 1851 | Wide Open Quarry, Longbenton | HO107/2411 Dist 4 page 67 | | |