1901 Census - surnames beginning with I
| Last Name | First Name | Age | Parish | Piece | Folio | Page |
| IDDON | Joseph | 23 | Douglas | 5304 | 108 | 92 |
| INCE | Austin V | 3 | Malew | 5308 | 77 | 54 |
| INCE | Ellen | 11 | Malew | 5308 | 77 | 54 |
| INCE | Betsy | 45 | Malew | 5308 | 77 | 54 |
| INCE | Lizzie | 13 | Malew | 5308 | 77 | 54 |
| INCE | Henry | 14 | Malew | 5308 | 77 | 54 |
| INCE | Mary J | 18 | Malew | 5308 | 77 | 54 |
| INCE | William | 42 | Malew | 5308 | 77 | 54 |
| INCE | William E | 14 | Malew | 5308 | 77 | 54 |
| INDERSLEY | Clara C | 20 | Braddan | 5301 | 5 | 8 |
| INGHAM | Christopher | 49 | Douglas | 5304 | 126 | 136 |
| INGHAM | Edith | 21 | Douglas | 5304 | 11 | 73 |
| INGHAM | Elizabeth A | 21 | Douglas | 5304 | 126 | 136 |
| INGHAM | Mary Ann | 46 | Douglas | 5304 | 126 | 136 |
| INGLIS | Christina | 2 | Douglas | 5305 | 8 | 35 |
| INGLIS | David | 50 | Douglas | 5304 | 47 | 62 |
| INGLIS | Isobel | 13 | Douglas | 5304 | 47 | 62 |
| INGLIS | James | 34 | Douglas | 5305 | 8 | 35 |
| INGLIS | Jane | 52 | Douglas | 5304 | 47 | 62 |
| INGLIS | Jean | 7 | Douglas | 5304 | 47 | 62 |
| INGLIS | John D | 4 | Douglas | 5305 | 8 | 35 |
| INGLIS | Mary A | 33 | Douglas | 5305 | 8 | 35 |
| INGRAM | Alexander | 24 | Malew | 5308 | 39 | 83 |
| INGRAM | Edith M | 34 | Douglas | 5304 | 52 | 120 |
| INGRAM | Maggie Lee | 28 | Malew | 5308 | 39 | 83 |
| ION | Claudius J | 48 | Braddan | 5301 | 28 | 118 |
| ION | Dorothy B | 4 | Braddan | 5301 | 28 | 118 |
| ION | Frank B | 2 | Braddan | 5301 | 28 | 118 |
| ION | Gertrude B | 11 mos | Braddan | 5301 | 28 | 118 |
| ION | Mary J B | 30 | Braddan | 5301 | 28 | 118 |
| ION | Michael B | 3 | Braddan | 5301 | 28 | 118 |
| IRELAND | Godfrey Johnson | 14 | Lonan | 5307 | 56 | 34 |
| IRELAND | Gordon Donaldson | 16 | Lonan | 5307 | 56 | 34 |
| IRELAND | Isabella A | 25 | Lonan | 5307 | 63 | 124 |
| IRELAND | Margaret | 52 | Lonan | 5307 | 56 | 34 |
| IRELAND | Robert J | 22 | Lonan | 5307 | 63 | 124 |
| IRONCROFT | Thomas | 25 | Douglas | 5304 | 32 | 99 |
| IRVING | Alice | 40 | Peel | 5306 | 26 | 13 |
| IRVING | Alice | 6 | Peel | 5306 | 26 | 13 |
| IRVING | Ann | 76 | Lonan | 5307 | 74 | 63 |
| IRVING | Annette | 63 | Douglas | 5304 | 25 | 3 |
| IRVINE | David | 14 | German | 5306 | 69 | 11 |
| IRVING | Dora | 2 | Peel | 5306 | 26 | 13 |
| IRVING | Edith A | 29 | Douglas | 5304 | 25 | 3 |
| IRVING | Nellie | 12 | Peel | 5306 | 26 | 13 |
| IRVING | Bessie | 17 | Peel | 5306 | 26 | 13 |
| IRVING | Elsie J | 10 | Lezayre | 5300 | 96 | 49 |
| IRVING | Esther | 46 | Lezayre | 5300 | 96 | 49 |
| IRVING | Evelyn | 10 | Lonan | 5307 | 42 | 72 |
| IRVING | Florence E | 25 | Douglas | 5304 | 25 | 3 |
| IRVING | Gordon T | 2 | Lezayre | 5300 | 96 | 49 |
| IRVING | Isabella | 18 | Lonan | 5307 | 42 | 72 |
| IRVING | Isabell | 3 | Peel | 5306 | 26 | 13 |
| IRVING | Jackson | 10 mos | Peel | 5306 | 26 | 13 |
| IRVING | James | 50 | Lezayre | 5300 | 96 | 49 |
| IRVING | John | 23 | Lonan | 5307 | 42 | 72 |
| IRVING | Joseph | 48 | Peel | 5306 | 26 | 13 |
| IRVING | Joseph | 8 | Peel | 5306 | 26 | 13 |
| IRVING | Mary | 17 | Lonan | 5307 | 42 | 72 |
| IRVING | Millie | 15 | Peel | 5306 | 26 | 13 |
| IRVING | Raymond | 12 | Lezayre | 5300 | 96 | 49 |
| IRVING | Robert | 14 | Lonan | 5307 | 42 | 72 |
| IRVING | Susanah | 14 | Lezayre | 5300 | 96 | 49 |
| IRVING | Willie | 13 | Peel | 5306 | 26 | 13 |
| IRWIN | Nellie | 16 | Douglas | 5304 | 118 | 25 |
| IRWIN | Francis | 54 | Onchan | 5302 | 93 | 232 |
| IRWIN | George F | 10 | Onchan | 5302 | 93 | 232 |
| IRWIN | Hilda E M | 8 | Onchan | 5302 | 93 | 232 |
| IRWIN | Sarah E | 49 | Onchan | 5302 | 93 | 232 |
| IRWIN | Thomas G | 11 | Onchan | 5302 | 93 | 232 |
| ISAAC | Eliza | 63 | Peel | 5306 | 5 | 10 |
| ISDALE | Sarah A | 36 | Onchan | 5302 | 93 | 243 |
| ISHERWOOD | Charles G | 8 | Douglas | 5304 | 33 | 114 |
| ISHERWOOD | Ellen | 52 | Douglas | 5303 | 131 | 71 |
| ISHERWOOD | Ethel M | 4 | Douglas | 5304 | 33 | 114 |
| ISHERWOOD | George A M | 12 | Ramsey | 5307 | 97 | 97 |
| ISHERWOOD | Hilda C | 16 mos | Douglas | 5304 | 33 | 114 |
| ISHERWOOD | Mary A | 26 | Douglas | 5304 | 33 | 114 |
| ISHERWOOD | Richard | 5 | Douglas | 5303 | 131 | 71 |
| ISHERWOOD | Terrence H | 6 | Douglas | 5304 | 33 | 114 |
| ISHERWOOD | Thomas | 45 | Douglas | 5303 | 131 | 71 |
| ISHERWOOD | William S | 44 | Douglas | 5304 | 33 | 114 |