1901 Census - surnames beginning with U
| Last Name | First Name | Age | Parish | Piece | Folio | Page |
| UDALL | Millicent | 17 | Onchan | 5302 | 149 | 39 |
| UDALL | Sarah | 68 | Douglas | 5304 | 5 | 2 |
| UFELLER | Jessie | 40 | Marown | 5308 | 29 | 60 |
| UGLOW | Lavinia | 25 | Castletown | 5308 | 113 | 5 |
| UGLOW | Margaret | 62 | Castletown | 5308 | 113 | 5 |
| UGLOW | Thomas | 59 | Castletown | 5308 | 124 | 10 |
| UNDERHILL | Randolph K | 23 | Ramsey | 5307 | 141 | 216 |
| UNDERWOOD | Thomas | 41 | Rus | 5301 | 88 | 54 |
| UNION | Lily | 27 | Onchan | 5302 | 125 | 56 |
| UNSWORTH | Catherine A | 48 | Douglas | 5304 | 59 | 31 |
| UNSWORTH | Edwin | 39 | Douglas | 5305 | 20 | 193 |
| UNSWORTH | Elizabeth M | 43 | Onchan | 5302 | 153 | 91 |
| UNSWORTH | Elizabeth | 17 | Douglas | 5305 | 20 | 193 |
| UNSWORTH | Mary J | 43 | Douglas | 5305 | 20 | 193 |
| UNSWORTH | Thomas A | 43 | Onchan | 5302 | 153 | 91 |
| UNWIN | Elise M | 17 | Douglas | 5304 | 130 | 183 |
| UNWIN | Harriett A | 41 | Douglas | 5304 | 130 | 183 |
| UNWIN | Harry B | 11 | Douglas | 5304 | 130 | 183 |
| UNWIN | Lily | 3 | Onchan | 5302 | 141 | 258 |
| UPTON | Harriet | 58 | Kwc | 5308 | 94 | 27 |
| UPTON | Harry | 58 | Kwc | 5308 | 94 | 27 |
| UREN | Catherine | 42 | Patrick | 5306 | 148 | 21 |
| UREN | Dora | 15 | Patrick | 5306 | 158 | 117 |
| UREN | Edmund | 1 | Patrick | 5306 | 150 | 46 |
| UREN | Emily | 45 | Onchan | 5302 | 134 | 166 |
| UREN | Fanny E | 9 | Onchan | 5302 | 134 | 166 |
| UREN | Florence E | 7 | Onchan | 5302 | 134 | 166 |
| UREN | Godfrey J P H | 2 | Onchan | 5302 | 134 | 166 |
| UREN | James | 28 | Patrick | 5306 | 150 | 46 |
| UREN | John | 44 | Patrick | 5306 | 158 | 117 |
| UREN | John Richard | 18 | Patrick | 5306 | 158 | 117 |
| UREN | Lilian | 17 | Patrick | 5306 | 158 | 117 |
| UREN | Madeline W | 4 | Onchan | 5302 | 134 | 166 |
| UREN | Margaret | 40 | Marown | 5308 | 11 | 77 |
| UREN | Margaret A | 26 | Patrick | 5306 | 150 | 46 |
| UREN | Mildred G | 5 | Onchan | 5302 | 134 | 166 |
| UREN | Mirrion | 5 mos | Marown | 5308 | 11 | 77 |
| UREN | Muriel | 4 | Patrick | 5306 | 150 | 46 |
| UREN | Selina L | 11 | Onchan | 5302 | 134 | 166 |
| UREN | Thomas | 40 | Marown | 5308 | 11 | 77 |
| UREN | Thomas | 11 | Marown | 5308 | 11 | 77 |
| UREN | Wilfred | 11 | Patrick | 5306 | 158 | 117 |
| USHER | Emma Maria | 45 | Castletown | 5308 | 140 | 87 |