| 1940 | Walter Ridgely O'Sullivan | Head | 50 | Own | White | Married | Maryland | Sewer? Construction | Civil Engineer | |
| Olive Stark O'Sullivan | Wife | 40 | | White | Married | Connecticut | | | |
| W Ridgely O'Sullivan, Jr | Son | 19 | | White | Single | Pennsylvania | Electric Utility | Stock Boy | |
| William Stark O'Sullivan | Son | 17 | | White | Single | Pennsylvania | Electric Utility | Mail Boy | |
| Warren Stark O'Sullivan | Son | 13 | | White | Single | Pennsylvania | | | |
| Isabel O'Sullivan | Daughter | 9 | | White | Single | Pennsylvania | | | |
| 1950 | Walter Ridgely O'Sullivan | Head | 61 | | White | Married | Maryland | Road Construction | Civil Engineer | |
| Olive Stark O'Sullivan | Wife | 49 | | White | Married | Connecticut | | | |
| Isabel O'Sullivan | Daughter | 19 | | White | Never | Pennsylvania | Boro Library | Asst Librarian | |