| 1910 | John Howard Jefferies | Head | 40 | Own | White | Widowed | Pennsylvania | Life Insurance | Clerk | |
| Marjorie S Jefferies | Daughter | 13 | | White | Single | Pennsylvania | | | |
| John Howard Jefferies, Jr. | Son | 11 | | White | Single | Pennsylvania | | | |
| Mary S Jefferies | Mother | 65 | | White | Widowed | Pennsylvania | | | |
| David Woodruff | Father-in-law | 82 | | White | Widowed | New Jersey | Provisions | Retail | |
| Sarah Davis | Servant | 43 | | Black | Widowed | Maryland | Private family | Servant | |
| 1920 | John Howard Jefferies | Head | 49 | Own | White | Widowed | Pennsylvania | Insurance | Solicitor | |
| Marjorie S Jefferies | Daughter | 23 | | White | Single | Pennsylvania | | | |
| John Howard Jefferies, Jr. | Son | 19 | | White | Single | Pennsylvania | | | |
| Mary S Jefferies | Mother | 81 | | White | Widowed | Pennsylvania | | | |