
The census entries for surnames beginning with U:
| Surname | Given Name | Age | Birth Place | Precinct | Page/Line | ED | Notes |
| Ubrag | Carl | 24 | Sweden | Pasco | 13B/81 | 3-64 | Surname unclear |
| Ulrich | Erwin | WA | Connell | 4A/16 | 3-60 | Age unclear | |
| Ulrich | Esther | 6 | WA | Connell | 4A/15 | 3-60 | |
| Ulrich | Hannah | 31 | Germany | Connell | 4A/14 | 3-60 | |
| Ulrich | Otto | 32 | MN | Connell | 4A/13 | 3-60 | |
| Ulrich | Winfred | 1 1/3 | WA | Connell | 4A/17 | 3-60 | |
| Unger | Charles | 24 | MN | Connell | 7A/24 | 3-60 | |
| Uno | Zonego | 31 | Japan | Pasco | 23A/32 | 3-64 | Given name unclear |