RC
Robert Campbell — 1940 US Census Record
Model Tree available1940 United States Federal Census · Washington-County, Maryland
Our Model Tree links this Robert Campbell across the 1920, 1930 and 1940 US Censuses in Washington-County, Maryland (XGBoost, ~Confirmed), with identified parents William & William — first a son (b.~1917), then head of a 3-person household.
Age 23
b. ~1917
Male
Son
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Washington-County, Maryland |
| Surname | Campbell |
| Given Name | Robert S. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Hagerstown |
| 1935 Residence (County) | Washington |
| Additional Details | |
| Occupation | Medical Doctor |
| Industry | Hospital |
| Class of Worker | PW |
| Hours Worked | 32 |
| Income (1939) | 132 |
| Highest Grade | C-3 |
| 1935 Residence | Same House |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Medical Doctor |
| Township / Ward | Hagerstown |
| Est. Birth Year | ~1917 |
Household Members
Census records only state relationship to the household head.
Pairwise kinship is derived (~90–95% accurate), not recorded.
Step/blended families and boarders can break it.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| William Campbell | Head | — | 55 | ~1885 |
| Robert Campbell | Son | — | 23 | ~1917 |
| Marie Campbell | Spouse | — | 55 | ~1885 |
Census Appearances
1920
Washington, Maryland
Son, age 2
Washington, Maryland · implied b. ~1918 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | Robert V. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | West Virginia |
| Occupation | none |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Washington, Maryland
Son, age 13
Washington, Maryland · implied b. ~1917 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | West Virginia |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Washington-County, Maryland
Son, age 23
Washington-County, Maryland · implied b. ~1917 — 3 household members
| Surname | Campbell |
| Given Name | Robert S. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Hagerstown |
| 1935 Residence (County) | Washington |
| Occupation | Medical Doctor |
| Industry | Hospital |
| Class of Worker | PW |
| Hours Worked | 32 |
| Income (1939) | 132 |
| Highest Grade | C-3 |
| 1935 Residence | Same House |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
Model Tree
An inferred pedigree reconstructed from census links — up to 4 generations within the 1900–1950 window. Closer generations are built from household co-residence; deeper ones are bridged by following a relative to their own childhood census. Confidence compounds and weakens with each generation.
Our Model Tree links Robert Campbell across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father William Campbell (~0.92 confidence) and father William Campbell (~0.92 confidence) and father William Campbell (~0.92 confidence) and mother Marie Campbell (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Campbell
b. ~1875
Source father
● Household
· direct · ~0.92
Father
William Campbell
b. ~1875
Source father
● Household
· direct · ~0.92
Father
William Campbell
b. ~1885
Source father
● Household
· direct · ~0.92
Mother
Marie Campbell
b. ~1885
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Campbell
Son · 1940 · age 23 · b. ~1917 · Maryland
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Washington-County, Maryland
Open full size
1940 US Federal Census — Washington-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01561-00149)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Marie Dillman | 49 | Head | None Resident | Virginia |
| 2 | John A. Heil | 28 | Head | Accountant | Maryland |
| 3 | Edna Heil | 26 | Wife | Glove Folder | Maryland |
| 4 | William Campbell | 55 | Head | Medical Doctor | Maryland |
| 5 | Marie Campbell | 55 | Wife | — | West Virginia |
| 6 | Robert S. Campbell THIS PERSON | 23 | Son | Medical Doctor | Maryland |
| 7 | Thrill B. Campbell | 32 | Head | Medical Doctor | Maryland |
| 8 | Marjorie Campbell | 27 | Wife | — | Pennsylvania |
| 9 | Florence Campbell | 1 | Daughter | — | Maryland |
| 10 | John D. Bower | 54 | Head | Cashier | Pennsylvania |
| 11 | Helen B. Bower | 53 | Wife | — | Maryland |
| 12 | Helen J. Bower | 26 | Daughter | Proof Reader | Maryland |
| 13 | Mary E. Brown | 37 | Head | Stenographer | Maryland |
| 14 | Carol Beard | 42 | Friend | Dry Goods Clerk | Maryland |
| 15 | Bryan L. Wenz | 42 | Head | Nektie Salesman | Pennsylvania |
| 16 | Martha Wenz | 36 | Wife | — | Pennsylvania |
| 17 | Howard Lee | 54 | Brother in law | — | Maryland |
| 18 | Lawrence Campbell | 48 | Head | Project Supervisor | Maryland |
| 19 | Cora Campbell | 43 | Wife | — | Maryland |
| 20 | Winifred Campbell | 48 | Head | Kindergarten Teacher | Virginia |
| 21 | Catherine Hordey | 26 | Niece | Librarian | Maryland |
| 22 | William S. Ness | 52 | Head | Reverend | Maryland |
| 23 | Sara Ness | 48 | Wife | — | Pennsylvania |
| 24 | John A. Macfadden | 11 | Nephew | — | New Jersey |
| 25 | William Lowe | 13 | Lodger | — | West Virginia |
| 26 | Helen Hawkins | 32 | Head | — | Maryland |
| 27 | Madeline Hawkins | 13 | Daughter | — | Virginia |
| 28 | Marty Hawkins | 8 | Daughter | — | Virginia |
| 29 | Madeline Hawkins | 13 | Daughter | Waitress | Virginia |
| 30 | Marty Hawkins | 8 | Daughter | — | Virginia |
| 31 | Raymond Munson | 49 | Head | Truck Driver | Maryland |
| 32 | Vernon Palladino | 39 | Head | Rough Reader | Maryland |
| 33 | Lottie Palladino | 31 | Wife | — | West Virginia |
| 34 | Bertha Hose | 47 | Head | Knitter | Maryland |
| 35 | Evelyn Hose | 16 | Daughter | — | Maryland |
| 36 | Jane Hose | 13 | Daughter | — | Maryland |
| 37 | Hattie Rubeck | 47 | Head | Knitter | Pennsylvania |
| 38 | Flora Morris | 40 | Head | Housekeeper | Virginia |
| 39 | Ralph Morris | 14 | Son | — | Maryland |
| 40 | Arthur Morris | 12 | Son | — | Maryland |
Pedigree Summary
Robert
Gen 1 · 4 parents
~0.92
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 United States Federal Census (NARA). Our Model Tree links this person across census decades using XGBoost-based record linkage, with per-link confidence scores. Household corroboration strengthens the signal when co-residents appear on the same census pages in multiple years.
Source: National Archives and Records Administration (NARA)