RC
Ruth Campbell — 1940 US Census Record
Model Tree available1940 United States Federal Census · St.-Clair-County, Michigan
Our Model Tree links this Ruth Campbell across the 1920, 1930 and 1940 US Censuses in St.-Clair-County, Michigan (XGBoost, ~Confirmed), with identified parents Edith & James — first a daughter (b.~1916), then head of a 9-person household.
Age 24
b. ~1916
Female
Daughter
Born: Michigan
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | St.-Clair-County, Michigan |
| Surname | Campbell |
| Given Name | Ruth M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | St. Clair |
| 1935 Residence (County) | St. Clair |
| Additional Details | |
| Occupation | Payroll Clerk |
| Industry | Diamond Salt Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 750 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
| Occupation | Payroll Clerk |
| Township / Ward | St Clair |
| Est. Birth Year | ~1916 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Ruth | Age | Birth yr |
|---|---|---|---|---|
| Ruth Campbell | Daughter | — | 24 | ~1916 |
| William Campbell | Head | — | 52 | ~1888 |
| Peter Wolff | Other | — | 86 | ~1854 |
| Edwin Campbell | Son | — | 20 | ~1920 |
| Wilford Campbell | Son | — | 19 | ~1921 |
| Robert Campbell | Son | — | 9 | ~1931 |
| Charlton Campbell | Son | — | 13 | ~1927 |
| William Campbell | Son | — | 16 | ~1924 |
| Susan Campbell | Spouse | — | 51 | ~1889 |
Census Appearances
1920
St Clair, …
Daughter, age 3
St Clair, Michigan · implied b. ~1917 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | Ruth D. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Michigan |
| Father's Birthplace | Michigan |
| Mother's Birthplace | Canada |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1930
St Clair, …
Daughter, age 14
St Clair, Michigan · implied b. ~1916 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | Ruth |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Michigan |
| Father's Birthplace | Michigan |
| Mother's Birthplace | Michigan |
| Can Read/Write | Yes |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1940
St.-Clair-County, Michigan
Daughter, age 24
St.-Clair-County, Michigan · implied b. ~1916 — 9 household members
| Surname | Campbell |
| Given Name | Ruth M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | St. Clair |
| 1935 Residence (County) | St. Clair |
| Occupation | Payroll Clerk |
| Industry | Diamond Salt Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 750 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
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. Identified parents: mother Edith Campbell (~0.92 confidence) and father James Campbell (~0.92 confidence) and father William Campbell (~0.92 confidence) and father William Campbell (~0.92 confidence) and mother Susan Campbell (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Edith Campbell
b. ~1881
Source mother
● Household
· direct · ~0.92
Father
James Campbell
b. ~1883
Source father
● Household
· direct · ~0.92
Father
William Campbell
b. ~1887
Source father
● Household
· direct · ~0.92
Father
William Campbell
b. ~1888
Source father
● Household
· direct · ~0.92
Mother
Susan Campbell
b. ~1889
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Ruth Campbell
Daughter · 1940 · age 24 · b. ~1916 · Michigan
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Sibling
Edwin Campbell
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Wilford Campbell
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Campbell
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charlton Campbell
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Campbell
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — St.-Clair-County, Michigan
Open full size
1940 US Federal Census — St.-Clair-County, Michigan
Page Contents
38 people indexed on this census page (nara:1940:m-t0627-01816-00866)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Isabel Busse | 69 | Head | — | Canada-English |
| 43 | Clem D. Denomy | 43 | Head | Salt Maker | Canada-French |
| 44 | Josephine M. Denomy | 51 | Wife | Housekeeper | Ohio |
| 45 | Jacqueline Anne Denomy | 12 | Daughter | — | Michigan |
| 46 | Ralph W. Loxley | 25 | Step-son | Sailor | Michigan |
| 47 | Ruth Loxley | 19 | Step-daughter | Stenographer | Michigan |
| 48 | Phyllis Loxley | 17 | Step-daughter | — | Michigan |
| 49 | Donald G. Ross | 35 | Son-in-law | Teacher | Michigan |
| 50 | Amelia L. Ross | 32 | Step-daughter | — | Michigan |
| 51 | John W. Ross | 1 | Grandson | — | Michigan |
| 52 | John V. Kemp | 56 | Head | Coal Dealer | Michigan |
| 53 | Mary E. Kemp | 84 | Mother | — | Wales |
| 54 | William G. Campbell | 52 | Head | Superintendent | Michigan |
| 55 | Susan C. Campbell | 51 | Wife | — | Michigan |
| 56 | Edwin J. Campbell | 20 | Son | — | Michigan |
| 57 | Ruth M. Campbell THIS PERSON | 24 | Daughter | Payroll Clerk | Michigan |
| 58 | Wilford K. Campbell | 19 | Son | — | Michigan |
| 59 | William G. Campbell | 16 | Son | — | Michigan |
| 60 | Charlton J. Campbell | 13 | Son | — | Michigan |
| 61 | Robert Allan Campbell | 9 | Son | — | Michigan |
| 62 | Peter Wolff | 86 | Father-in-law | — | Michigan |
| 63 | Maude V. Frantz | 58 | Head | — | Michigan |
| 64 | William D. Frantz | 32 | Son | Engineer | Michigan |
| 65 | Russell Frantz | 27 | Son | Fireman | Michigan |
| 66 | Thomas Frantz | 20 | Son | Fireman | Michigan |
| 67 | Bruce Frantz | 16 | Son | Farm Laborer | Michigan |
| 68 | William G. Sumner | 83 | Father | — | Canada-English |
| 70 | Fred E. Ingles | 26 | Head | Packer | Michigan |
| 71 | Norma M. Ingles | 24 | Wife | — | Michigan |
| 72 | Frederick H. Ingles | 4 | Son | — | Michigan |
| 73 | Karan Ingles | 3 | Daughter | — | Michigan |
| 74 | Frank J. Kramp | 48 | Head | Factory Laborer | Michigan |
| 75 | Cecelia Kramp | 41 | Wife | — | Canada-English |
| 76 | Leo Kramp | 21 | Son | Salesman | Michigan |
| 77 | Robert Kramp | 15 | Son | — | Michigan |
| 78 | Donald Kramp | 12 | Son | — | Michigan |
| 79 | Sarah Haskell | 72 | Head | — | Scotland |
| 80 | Horace Lenaway | 28 | Head | Janitor | Michigan |
Pedigree Summary
Ruth + 5 siblings
Gen 1 · 5 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)