RC
Ruth Campbell — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Los-Angeles-County, California
Our Model Tree links this Ruth Campbell across the 1920, 1930 and 1940 US Censuses in Los-Angeles-County, California (XGBoost, ~Confirmed) — first a spouse (b.~1892), then head of a 3-person household.
Age 48
b. ~1892
Female
Spouse
Born: Ohio
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Los-Angeles-County, California |
| Surname | Campbell |
| Given Name | Ruth |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | Ohio |
| 1935 Residence (City) | Pomona City |
| 1935 Residence (County) | Los Angeles |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same house |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Township / Ward | Pomona City |
| Est. Birth Year | ~1892 |
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 Ruth | Age | Birth yr |
|---|---|---|---|---|
| William Campbell | Head | — | 51 | ~1889 |
| William Campbell | Son | — | 20 | ~1920 |
| Ruth Campbell | Spouse | — | 48 | ~1892 |
Census Appearances
1920
Los Angeles, …
Spouse, age 28
Los Angeles, California · implied b. ~1892 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | Ruth C. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1930
Los Angeles, …
Spouse, age 38
Los Angeles, California · implied b. ~1892 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | Ruth |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Ohio |
| Age at First Marriage | 20 |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Los-Angeles-County, California
Spouse, age 48
Los-Angeles-County, California · implied b. ~1892 — 3 household members
| Surname | Campbell |
| Given Name | Ruth |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | Ohio |
| 1935 Residence (City) | Pomona City |
| 1935 Residence (County) | Los Angeles |
| Income (1939) | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same house |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
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 Ruth Campbell across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Ruth Campbell
Spouse · 1940 · age 48 · b. ~1892 · California
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Los-Angeles-County, California
Open full size
1940 US Federal Census — Los-Angeles-County, California
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00255-00702)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Dancy | 17 | Daughter | — | Arizona |
| 2 | Son Stanton | 9 | Son | — | California |
| 3 | Lorenz Mcharkin | 65 | Head | Manager | Nebraska |
| 4 | Hattie Mcharkin | 60 | Wife | — | Kansas |
| 5 | Louisa Flippen | 70 | Head | — | Iowa |
| 6 | Louella Harris | 42 | Daughter | — | Colorado |
| 7 | Mary E. Johnson | 64 | Head | Teacher | Massachusetts |
| 8 | Miriam Davis | 30 | Daughter | — | Utah |
| 9 | Christina Johnson | 93 | Mother | — | Sweden |
| 10 | Charles Johnson | 24 | Son | Accountant | Utah |
| 11 | John F. Bradley | 85 | Head | — | New York |
| 12 | Alice O. Bradley | 84 | Wife | — | New York |
| 13 | Gertrude King | 36 | Head | Teacher | Missouri |
| 14 | Lucille King | 24 | Sister | Teacher | Missouri |
| 15 | Douglas Hubbell | 35 | Head | Escrow Clerk | California |
| 16 | Roberta Hubbell | 37 | Wife | — | Georgia |
| 17 | Marian Hubbell | 16 | Daughter | — | Arizona |
| 18 | Sylvia Jane Hubbell | 5 | Daughter | — | California |
| 19 | Ralph Mcmullen | 63 | Head | Meat Cutter | Pennsylvania |
| 20 | Olive E. Mcmullen | 67 | Wife | — | Pennsylvania |
| 21 | Maude Remington | 69 | Head | — | Missouri |
| 22 | Adolph Threnoring | 86 | Head | Bookkeeper | Michigan |
| 23 | Caroline Threnoring | 65 | Wife | — | Michigan |
| 24 | Benjamin Miller | 56 | Head | — | Michigan |
| 25 | Laura Wood | 64 | Housekeeper | Housekeeper | Indiana |
| 26 | William Campbell | 51 | Head | District Manager | Kansas |
| 27 | Ruth Campbell THIS PERSON | 48 | Wife | — | Ohio |
| 28 | William Jr. Campbell | 20 | Son | — | California |
| 29 | Homer Elliott | 40 | Head | Chaplain | Kansas |
| 30 | Bertice Elliott | 36 | Wife | — | Nebraska |
| 31 | Carol Jeanne Elliott | 11 | Daughter | — | California |
| 32 | Ronald Lee Elliott | 9 | Son | — | California |
| 33 | Alpha R. Thayer | 68 | Head | — | Ohio |
| 34 | Mary Thayer | 46 | Wife | — | Kansas |
| 35 | Repaz Thayer | 7 | Son | — | California |
| 36 | Willis S. Hufford | 70 | Head | — | Iowa |
| 37 | Grace Hufford | 60 | Wife | — | Iowa |
| 38 | Dora Cavanaugh | 66 | Head | — | Tennessee |
| 39 | William M. Cavanaugh | 43 | Son | Mechanic | Arizona |
| 40 | Lester Cavanaugh | 27 | Son | Paper Cutter | Arizona |
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)