1891 Census - surnames beginning with O
| Last Name | First Name | Age | Parish | Piece | Folio | Page |
| O'BRIEN | Mary | 60 | Douglas | 4689 | 14 | 191 |
| O'BRIEN | Mary | 24 | Douglas | 4688 | 122 | 3 |
| O'BYRNE | Thomas | 28 | Douglas | 4687 | 116 | 132 |
| O'CONNER | Mary Ann | 27 | Douglas | 4687 | 54 | 34 |
| O'CONNER | Minnie | 27 | Douglas | 4687 | 107 | 9 |
| O'CONNOR | Agnes | 25 | Douglas | 4687 | 74 | 86 |
| O'CONNOR | Catherine | 64 | Douglas | 4687 | 28 | 84 |
| O'CONNOR | Edward | 4 | Douglas | 4689 | 67 | 122 |
| O'CONNOR | Eliza E | 45 | Douglas | 4689 | 67 | 122 |
| O'CONNOR | Elizabeth | 13 | Douglas | 4687 | 126 | 66 |
| O'CONNOR | Emily | 38 | Douglas | 4687 | 126 | 66 |
| O'CONNOR | Emily | 15 | Douglas | 4687 | 126 | 66 |
| O'CONNOR | James | 60 | Douglas | 4687 | 74 | 86 |
| O'CONNOR | James | 10 | Douglas | 4689 | 67 | 122 |
| O'CONNOR | Mary Ann | 55 | Douglas | 4687 | 53 | 22 |
| O'CONNOR | Mary | 33 | Douglas | 4687 | 116 | 132 |
| O'CONNOR | Mary | 7 | Douglas | 4687 | 126 | 66 |
| O'CONNOR | Philip | 38 | Douglas | 4687 | 126 | 66 |
| O'CONNOR | Richard | 46 | Douglas | 4689 | 67 | 122 |
| O'CONNOR | William | 11 | Douglas | 4687 | 126 | 66 |
| O'HAGEN | Mary | 40 | Peel | 4683 | 28 | 279 |
| O'HAGEN | Mary | 6 | Peel | 4683 | 28 | 279 |
| O'HARA | Alfred | 8 | Douglas | 4687 | 30 | 102 |
| O'HARA | Anne | 51 | Douglas | 4688 | 81 | 8 |
| O'HARA | Ann | 10 | Onchan | 4686 | 103 | 120 |
| O'HARA | Edward | 74 | Onchan | 4686 | 103 | 120 |
| O'HARA | Ellan | 50 | Onchan | 4686 | 103 | 120 |
| O'HARA | Ellen | 43 | Douglas | 4687 | 30 | 102 |
| O'HARA | Ellenor | 11 | Douglas | 4687 | 30 | 102 |
| O'HARA | Elizabeth | 5 | Douglas | 4687 | 30 | 102 |
| O'HARA | Hannah M | 45 | Douglas | 4688 | 57 | 199 |
| O'HARA | John | 50 | Douglas | 4688 | 81 | 8 |
| O'HARA | John James | 25 | Douglas | 4689 | 47 | 80 |
| O'HARA | Richard | 43 | Douglas | 4687 | 30 | 102 |
| O'HARA | Robert W | 22 | Douglas | 4689 | 47 | 80 |
| O'HARA | Robert | 20 | Douglas | 4687 | 30 | 102 |
| O'HARA | Thomas | 13 | Douglas | 4687 | 30 | 102 |
| O'HARE | John | 20 | Vessels | 4692 | 94 | 18 |
| O'KEEFFE | Mary Ann | 37 | Douglas | 4688 | 76 | 190 |
| O'KEEFFE | William James | 9 | Douglas | 4688 | 76 | 190 |
| OKELL | Ada O | 33 | Douglas | 4689 | 97 | 84 |
| OKELL | Ada Margaret | 9 | Douglas | 4689 | 97 | 84 |
| OKELL | Alfred William | 11 | Douglas | 4689 | 97 | 84 |
| OKELL | Charles Percy | 26 | Onchan | 4686 | 98 | 66 |
| OKELL | Charles Cyril | 2 | Onchan | 4686 | 98 | 66 |
| OKELL | Douglas E | 36 | Douglas | 4689 | 116 | 114 |
| OKELL | Marianne | 26 | Onchan | 4686 | 98 | 66 |
| OKELL | Robert | 47 | Onchan | 4686 | 118 | 148 |
| OKELL | William | 72 | Douglas | 4689 | 116 | 114 |
| OKELL | William Henry | 38 | Douglas | 4689 | 97 | 84 |
| O'MALLEY | Cusach J | 8 mos | Douglas | 4688 | 108 | 16 |
| O'MALLEY | David J | 38 | Douglas | 4688 | 108 | 16 |
| O'MALLEY | Edward L | 4 | Douglas | 4688 | 108 | 16 |
| O'MALLEY | Ellen M | 26 | Douglas | 4688 | 108 | 16 |
| O'MALLEY | Ida M | 3 | Douglas | 4688 | 108 | 16 |
| O'MALLEY | Victor D | 2 | Douglas | 4688 | 108 | 16 |
| O'NEIL | James | 32 | Douglas | 4687 | 48 | 135 |
| O'NEIL | James | 4 | Douglas | 4688 | 117 | 132 |
| O'NEIL | John | 41 | Douglas | 4688 | 117 | 132 |
| O'NEIL | John J | 17 | Douglas | 4687 | 126 | 66 |
| O'NEIL | John | 10 | Douglas | 4688 | 117 | 132 |
| O'NEIL | Mary | 80 | Douglas | 4687 | 38 | 12 |
| O'NEIL | Mary | 45 | Douglas | 4688 | 117 | 132 |
| O'NEIL | Mary | 25 | Douglas | 4687 | 48 | 135 |
| O'NEIL | Mary | 9 | Douglas | 4688 | 117 | 132 |
| O'NEIL | Michael | 12 | Douglas | 4688 | 117 | 132 |
| O'NEIL | Sarah Ann | 23 | Douglas | 4688 | 11 | 89 |
| O'NEIL | Thomas | 7 | Douglas | 4688 | 117 | 132 |
| O'SHEA | Mary J | 25 | Douglas | 4687 | 100 | 253 |
| O'SHEA | May F | 7 | Douglas | 4687 | 100 | 253 |
| OAKDEN | Ann | 61 | Douglas | 4688 | 82 | 17 |
| OAKDEN | Robert E | 34 | Douglas | 4688 | 82 | 17 |
| OATES | Alice | 19 | Douglas | 4689 | 74 | 44 |
| OATES | Alice | 11 | Malew | 4690 | 83 | 40 |
| OATES | Amy | 13 | Douglas | 4689 | 86 | 208 |
| OATES | Annie | 42 | Malew | 4690 | 83 | 40 |
| OATES | Annie | 7 | Malew | 4690 | 83 | 40 |
| OATES | Blanche E | 19 | Marown | 4683 | 89 | 12 |
| OATES | Catherine | 90 | Santon | 4690 | 67 | 29 |
| OATES | Catherine | 69 | Lezayre | 4684 | 122 | 21 |
| OATES | Catherine | 56 | Castletown | 4691 | 8 | 51 |
| OATES | Catherine | 54 | Douglas | 4689 | 84 | 167 |
| OATES | Catherine J | 41 | Douglas | 4688 | 33 | 162 |
| OATES | Charles | 21 | Douglas | 4687 | 41 | 55 |
| OATES | Christian | 52 | Marown | 4683 | 89 | 12 |
| OATES | Edith E | 16 | Douglas | 4689 | 43 | 29 |
| OATES | Edmund | 8 | Douglas | 4689 | 85 | 180 |
| OATES | Edward | 50 | Douglas | 4689 | 98 | 107 |
| OATS | Edward | 32 | Lonan | 4686 | 55 | 5 |
| OATES | Edward | 2 | Onchan | 4686 | 113 | 86 |
| OATES | Eddie | 3 mos | Malew | 4690 | 90 | 28 |
| OATS | Edwin C | 6 | Lonan | 4686 | 59 | 52 |
| OATES | Ellen | 75 | Douglas | 4687 | 41 | 55 |
| OATES | Ellen | 18 | Douglas | 4688 | 12 | 103 |
| OATES | Ellen Jane | 17 | Malew | 4690 | 136 | 25 |
| OATES | Elizabeth | 70 | German | 4682 | 82 | 85 |
| OATES | Elizabeth | 56 | Onchan | 4686 | 93 | 2 |
| OATES | Elizabeth | 41 | Douglas | 4688 | 76 | 182 |
| OATES | Elizabeth E | 35 | Douglas | 4687 | 64 | 167 |
| OATES | Elizabeth | 12 | Douglas | 4687 | 64 | 167 |
| OATES | Eliza | 12 | Patrick | 4682 | 33 | 18 |
| OATES | Elsie | 1 | Douglas | 4689 | 86 | 208 |
| OATS | Emily | 28 | Lonan | 4686 | 55 | 5 |
| OATES | Emily | 11 | Onchan | 4686 | 93 | 2 |
| OATES | Emma | 50 | Douglas | 4689 | 86 | 208 |
| OATES | Esther C | 16 | Douglas | 4689 | 57 | 13 |
| OATS | Eunice | 28 | Lonan | 4686 | 13 | 93 |
| OATS | Eunice | 1 | Lonan | 4686 | 13 | 93 |
| OATES | Fanny | 16 | Onchan | 4686 | 93 | 2 |
| OATES | Florence May | 10 | Douglas | 4688 | 12 | 103 |
| OATES | Frank | 6 | Malew | 4690 | 90 | 28 |
| OATES | Frederick | 39 | Douglas | 4687 | 64 | 167 |
| OATES | Frederick W | 13 | Douglas | 4687 | 64 | 167 |
| OATS | George H | 8 | Lonan | 4686 | 59 | 52 |
| OATES | Harriet | 26 | Braddan | 4690 | 19 | 42 |
| OATES | Henry | 3 | Malew | 4690 | 90 | 28 |
| OATS | Hilda Jane | 2 | Lonan | 4686 | 13 | 93 |
| OATES | Isaline | 4 | Douglas | 4689 | 85 | 180 |
| OATES | James | 86 | Douglas | 4687 | 79 | 140 |
| OATES | James | 76 | Onchan | 4686 | 113 | 86 |
| OATS | James | 63 | Lonan | 4686 | 59 | 52 |
| OATES | James | 62 | Douglas | 4689 | 43 | 29 |
| OATES | James | 47 | Douglas | 4689 | 86 | 208 |
| OATES | James | 36 | Douglas | 4689 | 84 | 180 |
| OATES | James N | 17 | Douglas | 4689 | 43 | 29 |
| OATES | James | 2 | Malew | 4690 | 83 | 40 |
| OATS | Jane | 64 | Lonan | 4686 | 59 | 52 |
| OATES | Jane | 34 | Douglas | 4689 | 84 | 180 |
| OATES | Jane | 18 | Onchan | 4686 | 93 | 2 |
| OATES | Jane | 14 | Lonan | 4686 | 68 | 7 |
| OATES | John James | 61 | Onchan | 4686 | 93 | 2 |
| OATES | John | 59 | Douglas | 4689 | 84 | 167 |
| OATS | John J | 18 | Lonan | 4686 | 59 | 52 |
| OATES | John | 15 | Malew | 4690 | 83 | 40 |
| OATES | John | 15 | Onchan | 4686 | 93 | 2 |
| OATES | John | 15 | Patrick | 4682 | 33 | 18 |
| OATES | John J | 14 | Douglas | 4689 | 85 | 180 |
| OATES | John James | 6 | Douglas | 4688 | 12 | 103 |
| OATES | Leonard | 2 | Douglas | 4688 | 12 | 103 |
| OATES | Louisa | 56 | Ramsey | 4685 | 11 | 92 |
| OATES | Margaret | 82 | Douglas | 4688 | 102 | 76 |
| OATES | Margaret | 67 | Lonan | 4686 | 29 | 173 |
| OATE | Margaret | 55 | Rushen | 4692 | 48 | 102 |
| OATES | Margaret A | 34 | Malew | 4690 | 90 | 28 |
| OATES | Margaret | 21 | Onchan | 4686 | 113 | 86 |
| OATS | Margaret Ebth | 20 | Peel | 4683 | 37 | 44 |
| OATES | Margaret J | 17 | Douglas | 4689 | 53 | 167 |
| OATES | Margaret Ann | 8 | Douglas | 4688 | 12 | 103 |
| OATE | Martha | 18 | Rushen | 4692 | 48 | 102 |
| OATES | Mary | 66 | Douglas | 4688 | 11 | 81 |
| OATES | Mary A | 52 | Douglas | 4689 | 43 | 29 |
| OATES | Mary | 50 | Douglas | 4689 | 98 | 107 |
| OATES | Mary E | 42 | Douglas | 4688 | 102 | 76 |
| OATES | Mary A | 41 | Braddan | 4690 | 11 | 90 |
| OATES | Matilda | 44 | Patrick | 4682 | 33 | 18 |
| OATES | Maud M | 13 | Douglas | 4689 | 43 | 29 |
| OATES | Robert | 43 | Malew | 4690 | 83 | 40 |
| OATES | Robert | 37 | Douglas | 4687 | 79 | 140 |
| OATES | Robert C | 22 | Castletown | 4691 | 7 | 48 |
| OATES | Robert | 19 | Santon | 4690 | 74 | 30 |
| OATES | Robert James | 10 | Douglas | 4687 | 64 | 167 |
| OATES | Robert | 10 | Douglas | 4689 | 85 | 180 |
| OATES | Robert Charles | 4 | Douglas | 4688 | 12 | 103 |
| OATES | Robert Abert | 2 | Douglas | 4687 | 73 | 74 |
| OATES | Robina | 20 | Douglas | 4687 | 124 | 44 |
| OATS | Samuel | 16 | Vessels | 4692 | 76 | 16 |
| OATES | Sarah | 40 | Douglas | 4688 | 12 | 103 |
| OATES | Susan | 27 | Douglas | 4689 | 53 | 170 |
| OATES | Thomas | 88 | German | 4682 | 82 | 85 |
| OATS | Thomas | 75 | Malew | 4690 | 129 | 33 |
| OATES | Thomas | 44 | Douglas | 4688 | 12 | 103 |
| OATES | Thomas | 43 | German | 4682 | 82 | 85 |
| OATES | Thomas | 40 | Lonan | 4686 | 29 | 173 |
| OATES | Thomas | 24 | Douglas | 4688 | 110 | 38 |
| OATES | Thomas F | 14 | Douglas | 4689 | 43 | 29 |
| OATES | Thomas Ernest | 13 | Douglas | 4688 | 12 | 103 |
| OATES | Thomas | 10 | Malew | 4690 | 83 | 40 |
| OATS | Walter | 24 | Lonan | 4686 | 59 | 52 |
| OATES | Walter | 7 mos | Douglas | 4687 | 64 | 167 |
| OATES | William R | 46 | Douglas | 4688 | 44 | 50 |
| OATES | William H | 37 | Malew | 4690 | 90 | 28 |
| OATS | William | 26 | Lonan | 4686 | 13 | 93 |
| OATES | William | 19 | German | 4682 | 77 | 38 |
| OATES | William Henry | 15 | Douglas | 4688 | 12 | 103 |
| OATES | William | 14 | Malew | 4690 | 83 | 40 |
| OATS | William A | 10 | Lonan | 4686 | 59 | 52 |
| OATES | William R | 4 | Malew | 4690 | 90 | 28 |
| ODDY | Polly | 12 | Douglas | 4689 | 53 | 169 |
| OLDALE | Annie | 42 | Braddan | 4690 | 54 | 11 |
| OLDALE | John | 46 | Douglas | 4688 | 24 | 36 |
| OLDALE | Joseph F | 14 | Douglas | 4688 | 24 | 36 |
| OLDCROFT | Catherine | 79 | Douglas | 4689 | 47 | 76 |
| OLDFIELD | Elizabeth | 69 | Douglas | 4687 | 102 | 273 |
| OLDHAM | Raby | 27 | Douglas | 4689 | 62 | 69 |
| OLDHAM | Reta | 24 | Douglas | 4689 | 62 | 69 |
| OLDROYD | Emma | 49 | Douglas | 4689 | 98 | 99 |
| OLDROYD | Emma | 14 | Douglas | 4689 | 98 | 99 |
| OLIPHANT | Catherine | 26 | Maughold | 4684 | 159 | 29 |
| OLIPHANT | Catherine A | 3 | Maughold | 4684 | 159 | 29 |
| OLIPHANT | Edith | 8 | Maughold | 4684 | 159 | 29 |
| OLIPHANT | Eleanor J | 5 | Maughold | 4684 | 159 | 29 |
| OLIPHANT | Joshua | 32 | Maughold | 4684 | 159 | 29 |
| OLIPHANT | William H | 1 | Maughold | 4684 | 159 | 29 |
| OLIVER | Benjamin | 4 mos | Lonan | 4686 | 5 | 12 |
| OLIVER | Elijah | 5 | Lonan | 4686 | 5 | 12 |
| OLIVER | Eleanor | 33 | Lonan | 4686 | 50 | 89 |
| OLIVER | Elizabeth | 40 | Lonan | 4686 | 5 | 12 |
| OLIVER | John | 50 | Lonan | 4686 | 5 | 12 |
| OLIVER | John J | 15 | Lonan | 4686 | 5 | 12 |
| OLIVER | Joshua E | 9 | Lonan | 4686 | 5 | 12 |
| OLIVER | Margaret A | 13 | Lonan | 4686 | 5 | 12 |
| ORMEROD | Sarah | 69 | Douglas | 4689 | 116 | 115 |
| OPENSHAW | James | 81 | Castletown | 4691 | 48 | 82 |
| OPENSHAW | Margaret | 80 | Castletown | 4691 | 48 | 82 |
| ORDISH | William A | 19 | Douglas | 4688 | 72 | 146 |
| ORR | Emily | 22 | Lonan | 4686 | 19 | 39 |
| ORR | Esther | 65 | German | 4682 | 88 | 29 |
| ORE | James | 60 | Onchan | 4686 | 117 | 146 |
| ORR | John | 66 | German | 4682 | 88 | 29 |
| ORR | Mary | 59 | Lonan | 4686 | 19 | 39 |
| ORE | Thomas | 40 | Patrick | 4682 | 55 | 25 |
| ORKILL | John | 57 | Vessels | 4692 | 83 | 56 |
| ORMSTEAD | Edward | 70 | German | 4682 | 78 | 48 |
| OSBOURNE | Abraham | 16 | Andreas | 4684 | 92 | 74 |
| OSBORN | Annie | 40 | Andreas | 4684 | 66 | 78 |
| OSBORNE | Elizabeth | 20 | Castletown | 4691 | 11 | 106 |
| OSBOURNE | Emma | 45 | Lonan | 4686 | 61 | 89 |
| OSBORNE | Henry | 24 | Castletown | 4691 | 56 | 23 |
| OSBORNE | Margaret E | 38 | Douglas | 4688 | 30 | 113 |
| OSBORNE | Richard | 63 | Douglas | 4688 | 125 | 34 |
| OSBORNE | Thomas | 19 | Vessels | 4692 | 103 | 105 |
| OSBOURNE | William | 70 | Lonan | 4686 | 61 | 89 |
| OSMOND | James | 18 | Douglas | 4687 | 109 | 36 |
| OTTERSON | David | 32 | Ramsey | 4685 | 50 | 109 |
| OTTERSON | Elizabeth | 30 | Douglas | 4687 | 131 | 122 |
| OTTERSON | Francis | 34 | Douglas | 4687 | 131 | 122 |
| OTTERSON | Francis | 2 | Douglas | 4687 | 131 | 122 |
| OTTERSON | Mary | 25 | Ramsey | 4685 | 50 | 109 |
| OTTERSON | Ros A | 4 | Douglas | 4687 | 131 | 122 |
| OULTHAM | Ebenezer | 18 | Vessels | 4692 | 123 | 123 |
| OVERTON | Eliza | 62 | Douglas | 4689 | 114 | 88 |
| OVERTON | Martha | 60 | Douglas | 4689 | 114 | 88 |
| OWEN | Ann | 42 | Douglas | 4689 | 79 | 103 |
| OWEN | Annie | 35 | Onchan | 4686 | 118 | 149 |
| OWEN | Eliza A | 55 | Douglas | 4687 | 16 | 169 |
| OWEN | Elizabeth | 26 | Lonan | 4686 | 57 | 28 |
| OWEN | Elizabeth | 19 | Malew | 4690 | 95 | 88 |
| OWEN | Evan | 72 | Vessels | 4692 | 153 | 153 |
| OWEN | Hellowen | 38 | Vessels | 4692 | 153 | 153 |
| OWEN | William Alfred | 34 | Onchan | 4686 | 118 | 149 |
| OWENS | Mrs. | 60 | Douglas | 4688 | 116 | 112 |
| OWENS | Minnie | 12 | Lezayre | 4684 | 142 | 36 |