RC
Robert Campbell — 1940 US Census Record
Model Tree available1940 United States Federal Census · Orange-County, California
Our Model Tree links this Robert Campbell across the 1920, 1930 and 1940 US Censuses in Orange-County, California (XGBoost, ~Confirmed), with identified parents David & Julia — first a head (b.~1900), then head of a 4-person household.
Age 40
b. ~1900
Male
Head
Born: California
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Orange-County, California |
| Surname | Campbell |
| Given Name | Robert |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | California |
| 1935 Residence (City) | Orange |
| 1935 Residence (County) | Orange |
| Additional Details | |
| Occupation | Rancher |
| Class of Worker | OA |
| Hours Worked | 48 |
| Income (1939) | 40 |
| Highest Grade | C 5 |
| 1935 Residence | California |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Occupation | Rancher |
| Township / Ward | Villa Park Precinct |
| Est. Birth Year | ~1900 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Wayne Campbell | Daughter | — | 10 | ~1930 |
| Roberta Campbell | Daughter | — | 3 | ~1937 |
| Robert Campbell | Head | — | 40 | ~1900 |
| Ruth Campbell | Spouse | — | 35 | ~1905 |
Census Appearances
1920
Orange, California
Son, age 20
Orange, California · implied b. ~1900 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1930
Orange, California
Head, age 30
Orange, California · implied b. ~1900 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | Robert |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | California |
| Age at First Marriage | 26 |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | Rancher |
| Industry | Own ranch |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 8000 |
| Radio Set | R |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
Orange-County, California
Head, age 40
Orange-County, California · implied b. ~1900 — 4 household members
| Surname | Campbell |
| Given Name | Robert |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | California |
| 1935 Residence (City) | Orange |
| 1935 Residence (County) | Orange |
| Occupation | Rancher |
| Class of Worker | OA |
| Hours Worked | 48 |
| Income (1939) | 40 |
| Highest Grade | C 5 |
| 1935 Residence | California |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
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 David Campbell (~0.92 confidence) and mother Julia Campbell (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
David Campbell
b. ~1856
Source father
● Household
· direct · ~0.92
Mother
Julia Campbell
b. ~1868
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Campbell
Head · 1940 · age 40 · b. ~1900 · 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 — Orange-County, California
Open full size
1940 US Federal Census — Orange-County, California
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00273-00672)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | C. E. Squires | 46 | Head | Rancher | California |
| 2 | Lillian Squires | 36 | Wife | — | Texas |
| 3 | Mary D. Squires | 15 | Daughter | — | California |
| 4 | H. W. Wolff | 75 | Head | Rancher | England |
| 5 | Louise Wolff | 70 | Wife | — | England |
| 6 | Willard Smith | 58 | Head | Banker | California |
| 7 | Edna Smith | 54 | Wife | — | Kansas |
| 8 | Abbott Smith | 28 | Son | — | California |
| 9 | Willard Jr. Smith | 26 | Son | — | California |
| 10 | James Glen | 52 | Head | Ranch Worker | Texas |
| 11 | Nellie Glen | 47 | Wife | — | Arkansas |
| 12 | J. W. Mclean | 72 | Head | Ranch Man | Canada |
| 13 | Katherine Mclean | 76 | Wife | — | Canada |
| 14 | Richard W. Cole | 26 | Head | Laborer | Michigan |
| 15 | Ruby Cole | 21 | Wife | — | So. Dakota |
| 16 | Walter G. Timken | 46 | Head | Ranch Laborer | California |
| 17 | Alma Timken | 41 | Wife | — | California |
| 18 | Lawrence Timken | 21 | Son | Ranch Laborer | California |
| 19 | Irena Timken | 18 | Daughter | — | California |
| 20 | Bernice Timken | 15 | Daughter | — | California |
| 21 | Harry J. Kendall | 63 | Head | Gardener | Indiana |
| 22 | Inez G. Kendall | 47 | Wife | — | Indiana |
| 23 | Robert Campbell THIS PERSON | 40 | Head | Rancher | California |
| 24 | Ruth M. Campbell | 35 | Wife | — | Ohio |
| 25 | Wayne Campbell | 10 | Daughter | — | California |
| 26 | Roberta Campbell | 3 | Daughter | — | California |
| 27 | John D. Planthom | 54 | Head | — | Iowa |
| 28 | Robley Norman | 35 | Head | Florist | Minnesota |
| 29 | Augusta Norman | 34 | Wife | — | Kansas |
| 30 | Robert D. Norman | 10 | Son | — | Kansas |
| 31 | Raymond Norman | 7 | Son | — | Kansas |
| 32 | C. W. Bell | 53 | Head | Laborer | Indiana |
| 33 | Kathryn Bell | 23 | Wife | Packer | Pennsylvania |
| 34 | Janet Bell | 5 | Daughter | — | California |
| 35 | Shirley Bell | 4 | Daughter | — | California |
| 36 | James T. Bell | 58 | Head | Laborer | Indiana |
| 37 | Margaret Bell | 49 | Wife | Packer | Indiana |
| 38 | Daniel Markham | 40 | Head | — | Arkansas |
| 39 | Bernice Markham | 41 | Wife | Packer | Arkansas |
| 40 | Kenneth Lee Markham | 22 | Son | Service Sta. Attendant | Arkansas |
Pedigree Summary
Robert
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)