DC
David Campbell — 1940 US Census Record
Model Tree available1940 United States Federal Census · San-Diego-County, California
Our Model Tree links this David Campbell across the 1910, 1920, 1930 and 1940 US Censuses in San-Diego-County, California (XGBoost, ~Confirmed), with identified parents John & Elizabeth — first a head (b.~1884), then head of a 3-person household.
Age 56
b. ~1884
Male
Head
Born: Scotland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | San-Diego-County, California |
| Surname | Campbell |
| Given Name | David C. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 56 |
| Marital Status | Married |
| Birthplace | Scotland |
| 1935 Residence (City) | San Diego |
| 1935 Residence (County) | San Diego |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Manager |
| Industry | Paint Co. |
| Class of Worker | PW |
| Hours Worked | 60 |
| Income (1939) | 5000 |
| Highest Grade | H 2 |
| 1935 Residence | Same House |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
| Occupation | Manager |
| Township / Ward | San Diego |
| Est. Birth Year | ~1884 |
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 David | Age | Birth yr |
|---|---|---|---|---|
| Hazel Campbell | Spouse | — | 51 | ~1889 |
| Jean Campbell | Daughter | — | 14 | ~1926 |
| David Campbell | Head | — | 56 | ~1884 |
Census Appearances
1910
San Diego, …
Son, age 26
San Diego, California · implied b. ~1884 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | David |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Scotland |
| Year of Immigration | 1886 |
| Naturalization Status | Naturalized |
| Father's Birthplace | England |
| Mother's Birthplace | Scotland |
| Occupation | none |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1920
San Diego, …
Head, age 35
San Diego, California · implied b. ~1885 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | David C. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Scotland |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | Machinist |
| Industry | Machine Co. |
| Class of Worker | Em |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1930
San Diego, …
Head, age 46
San Diego, California · implied b. ~1884 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | David C |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Scotland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1887 |
| Age at First Marriage | 33 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | Proprietor |
| Industry | Machine Shop |
| Class of Worker | E |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Value / Rent | 6000 |
| Radio Set | R |
| Veteran | No |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1940
San-Diego-County, California
Head, age 56
San-Diego-County, California · implied b. ~1884 — 3 household members
| Surname | Campbell |
| Given Name | David C. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 56 |
| Marital Status | Married |
| Birthplace | Scotland |
| 1935 Residence (City) | San Diego |
| 1935 Residence (County) | San Diego |
| Naturalization Status | Naturalized |
| Occupation | Manager |
| Industry | Paint Co. |
| Class of Worker | PW |
| Hours Worked | 60 |
| Income (1939) | 5000 |
| Highest Grade | H 2 |
| 1935 Residence | Same House |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
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 David Campbell across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Campbell (~0.92 confidence) and mother Elizabeth Campbell (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Campbell
b. ~1856
Source father
● Household
· direct · ~0.92
Mother
Elizabeth Campbell
b. ~1858
Source mother
● Household
· direct · ~0.92
This person
Anchor record
David Campbell
Head · 1940 · age 56 · b. ~1884 · California
★ 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 — San-Diego-County, California
Open full size
1940 US Federal Census — San-Diego-County, California
Page Contents
37 people indexed on this census page (nara:1940:m-t0627-00447-00652)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Walter Hage | 43 | Head | President | California |
| 2 | Sara Hage | 41 | Wife | — | Pennsylvania |
| 3 | David C. Campbell THIS PERSON | 56 | Head | Manager | Scotland |
| 4 | Hazel V. Campbell | 51 | Wife | — | California |
| 5 | Jean E. Campbell | 14 | Daughter | — | California |
| 6 | William Kearns | 54 | Head | Superintendent | Nebraska |
| 7 | Grace Kearns | 50 | Wife | — | Nebraska |
| 8 | William Jr. Kearns | 24 | Son | — | Nebraska |
| 9 | Mary Kearns | 22 | Daughter | — | California |
| 10 | Pauline Kearns | 20 | Daughter | — | California |
| 11 | John Kearns | 18 | Son | — | California |
| 12 | Charles A. Hill | 55 | Head | — | New Jersey |
| 13 | Amy L. Hill | 43 | Wife | — | Missouri |
| 14 | Hughes Hill | 18 | Son | — | New Jersey |
| 15 | George Kirby | 46 | Gardener | Gardener | Alabama |
| 16 | William Wahrenberger | 48 | Head | Contractor | Colorado |
| 17 | Grace Wahrenberger | 47 | Wife | — | Illinois |
| 18 | Marjorie Wahrenberger | 19 | Daughter | — | California |
| 19 | John T. Martin | 46 | Head | Proprietor | Georgia |
| 20 | Susan C. Martin | 50 | Wife | — | New York |
| 21 | Barbara Jean Martin | 14 | Daughter | — | California |
| 22 | Grace Fuhrmeyer | 51 | Head | — | Ohio |
| 23 | Lila N. Robison | 83 | Head | — | Illinois |
| 24 | William D. Wright | 55 | Son in law | Owner | Illinois |
| 25 | Myrtle I. Wright | 56 | Daughter | — | Illinois |
| 26 | Mary Miller Carmichael | 42 | Mother in law | — | Arkansas |
| 27 | William Oakes | 50 | Head | Housekeeper | Pennsylvania |
| 28 | Louvena Oakes | 48 | Wife | Principal | Missouri |
| 29 | Billy Oakes | 14 | Son | — | California |
| 30 | T. Claud Ryan | 42 | Head | Managing Dir. | Kansas |
| 31 | Gladys Ryan | 40 | Wife | — | New Jersey |
| 32 | David Ryan | 10 | Son | — | California |
| 33 | Jerry Ryan | 8 | Son | — | California |
| 34 | Stephen Ryan | 1 | Son | — | California |
| 35 | Clarence Rees | 49 | Head | Surgeon | California |
| 36 | Sidonie Rees | 49 | Wife | — | Minnesota |
| 37 | William Rees | 23 | Son | Dist. Manager | California |
Pedigree Summary
David
Gen 1 · 2 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)