
The census entries for surnames beginning with Z:
| Surname | Given Name | Age | Birth Place | Precinct | Page/Line | ED | Notes |
| Zacharias | Joe | 20 | NE | Connell | 11A/12 | 3-60 | |
| Zent | Catherene P. | 29 | OR | Pasco | 4B/95 | 3-64 | |
| Zent | Charlote | 66 | PA | Pasco | 4B/94 | 3-64 | |
| Zent | George W. | 27 | WA | Pasco | 4B/96 | 3-64 | |
| Zeolas | Jim | 25 | Greece | Pasco | 19A/36 | 3-64 | |
| Zeparrisho | Joseph | 8 | WA | Connell | 14B/64 | 3-60 | Surname, age unclear |
| Zeparrisho | Lewis | 32 | Italy | Connell | 14B/62 | 3-60 | Surname unclear |
| Zeparrisho | Maria | 2 | WA | Connell | 14B/65 | 3-60 | Surname unclear |
| Zeparrisho | Marie | 26 | Italy | Connell | 14B/63 | 3-60 | Names unclear |
| Zeparrisho | Zippas | 6/12 | WA | Connell | 14B/66 | 3-60 | Names unclear |
| Zesta | Belligano | 21 | Italy | Connell | 15A/28 | 3-60 | Names unclear |
| Zuger | Alois | 32 | Switzerlnd | Fishhook | 4B/65 | 3-63 | |
| Zumwalt | Albert L. | 30 | ID | Nunamaker | 7A/13 | 3-61 | |
| Zumwalt | Birdie H. | 27 | CA | Nunamaker | 6A/2 | 3-61 | |
| Zumwalt | Byron J. | 33 | WA | Nunamaker | 6A/1 | 3-61 | |
| Zumwalt | Dot | 9/12 | WA | Nunamaker | 6A/6 | 3-61 | |
| Zumwalt | Fred | 5 | WA | Nunamaker | 6A/3 | 3-61 | |
| Zumwalt | Glen H. | 2 | WA | Nunamaker | 6A/5 | 3-61 | |
| Zumwalt | Mamie | 4 | WA | Nunamaker | 6A/4 | 3-61 |