Residents of St. Catharines, C — Sub-district A, surnames U (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 21 | udell | alice | F | 2 | Anglican | German | Ontario | No Occupation Listed | 304 |
| 16 | udell | edward | M | 28 | Anglican | German | United States | Labourers nfs | 304 |
| 17 | udell | hannah | F | 28 | Anglican | English | England | No Occupation Listed | 304 |
| 18 | udell | mary | F | 9 | Anglican | German | Ontario | No Occupation Listed | 304 |
| 20 | udell | samuel | M | 4 | Anglican | German | Ontario | No Occupation Listed | 304 |
| 22 | udell | samuel | M | 56 | Anglican | German | United States | No Occupation Listed | 304 |
| 19 | udell | titus | M | 6 | Anglican | German | Ontario | No Occupation Listed | 304 |
| 11 | unicume | edward | M | 6 | Anglican | English | Ontario | No Occupation Listed | 196 |
| 12 | unicume | ellen | F | 4 | Anglican | English | Ontario | No Occupation Listed | 196 |
| 9 | unicume | jane | F | 35 | Anglican | English | England | No Occupation Listed | 196 |
| 8 | unicume | thomas | M | 31 | Anglican | English | England | Dealer, merchant etc. (Wholesale & retail trade) | 196 |
| 10 | unicume | tom | M | 8 | Anglican | English | Ontario | No Occupation Listed | 196 |
| 22 | urquhart | alexander | M | 25 | Presbyterian | Scottish | Ontario | No Occupation Listed | 326 |