MC
Mary Campbell — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Eau-Claire-County, Wisconsin
Our Model Tree links this Mary Campbell across the 1910, 1920, 1930 and 1940 US Censuses in Eau-Claire-County, Wisconsin (XGBoost, ~Confirmed) — first a spouse (b.~1876), then head of a 6-person household.
Age 64
b. ~1876
Female
Spouse
Born: Norway
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Eau-Claire-County, Wisconsin |
| Surname | Campbell |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 64 |
| Marital Status | Married |
| Birthplace | Norway |
| 1935 Residence (City) | Eau Claire City |
| Naturalization Status | Naturalized |
| Additional Details | |
| Highest Grade | No 5 |
| Birth Country | Norway |
| Birthplace (normalized) | norway |
| Township / Ward | Eau Claire City |
| Est. Birth Year | ~1876 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Jeanette Campbell | Daughter | — | 26 | ~1914 |
| William Campbell | Head | — | 74 | ~1866 |
| John Campbell | Son | — | 36 | ~1904 |
| Gordon Campbell | Son | — | 28 | ~1912 |
| Norman Campbell | Son | — | 32 | ~1908 |
| Mary Campbell | Spouse | — | 64 | ~1876 |
Census Appearances
1910
Eau Claire, …
Spouse, age 34
Eau Claire, Wisconsin · implied b. ~1876 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 34 |
| Marital Status | Married |
| Birthplace | Norway |
| Years Married | 8 |
| Children Born | 4 |
| Children Living | 4 |
| Year of Immigration | 1881 |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Occupation | Teamster |
| Industry | Saw Mill |
| Birth Country | Norway |
| Birthplace (normalized) | norway |
1920
Eau Claire, …
Spouse, age 43
Eau Claire, Wisconsin · implied b. ~1877 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | Norway |
| Year of Immigration | 1882 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Norwegian |
| Birth Country | Norway |
| Birthplace (normalized) | norway |
1930
Eau Claire, …
Other, age 54
Eau Claire, Wisconsin · implied b. ~1876 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | Mary |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 54 |
| Marital Status | Married |
| Birthplace | Norway |
| Age at First Marriage | 25 |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Occupation | yes |
| Can Read/Write | Yes |
| Mother Tongue | Norwegian |
| Birth Country | Norway |
| Birthplace (normalized) | norway |
1940
Eau-Claire-County, Wisconsin
Spouse, age 64
Eau-Claire-County, Wisconsin · implied b. ~1876 — 6 household members
| Surname | Campbell |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 64 |
| Marital Status | Married |
| Birthplace | Norway |
| 1935 Residence (City) | Eau Claire City |
| Naturalization Status | Naturalized |
| Highest Grade | No 5 |
| Birth Country | Norway |
| Birthplace (normalized) | norway |
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 Mary Campbell across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Campbell
Spouse · 1940 · age 64 · b. ~1876 · Wisconsin
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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 — Eau-Claire-County, Wisconsin
Open full size
1940 US Federal Census — Eau-Claire-County, Wisconsin
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04477-00661)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Joan Johnson | 4 | Daughter | — | Wisconsin |
| 2 | Nora Berntson | 52 | Head | Ladies R-W-Store | Wisconsin |
| 3 | Clara Larson | 48 | Sister | Ladies R-W-Store | Wisconsin |
| 4 | Arlene Larson | 15 | Niece | — | Wisconsin |
| 5 | Tom Evenson | 12 | Head | — | Norway |
| 6 | Josephine Evenson | 56 | Wife | — | Wisconsin |
| 7 | Raymond Evenson | 23 | Son | Road-Equipt Co | Wisconsin |
| 8 | Claude Bergum | 39 | Head | Garbage Hauling | Wisconsin |
| 9 | Eva Bergum | 42 | Wife | — | Minnesota |
| 10 | Elaine Audrey Bergum | 16 | Daughter | — | Wisconsin |
| 11 | Marcel Bergum | 14 | Son | — | Wisconsin |
| 12 | Lois Bergum | 4 | Daughter | — | Wisconsin |
| 13 | Bennie Johnson | 34 | Head | Rubber Co | Wisconsin |
| 14 | Mary Johnson | 30 | Wife | — | Wisconsin |
| 15 | Arleen Johnson | 4 | Daughter | — | Wisconsin |
| 16 | Roger Johnson | 2 | Son | — | Wisconsin |
| 17 | Joseph Ward | 59 | Head | Laborer | England |
| 18 | Fanny Ward | 61 | Wife | — | North-Ireland |
| 19 | Colie Johnson | 46 | Head | Rubber Co | Wisconsin |
| 20 | William Campbell | 74 | Head | — | Canada English |
| 21 | Mary Campbell THIS PERSON | 64 | Wife | — | Norway |
| 22 | John Roy Campbell | 36 | Son | — | Wisconsin |
| 23 | Norman Willard Campbell | 32 | Son | Baking Co | Wisconsin |
| 24 | Gordon Donald Campbell | 28 | Son | Drug Store | Wisconsin |
| 25 | Jeanette Campbell | 26 | Daughter | Emp. Office | Wisconsin |
| 26 | Charles Lightfoot | 55 | Head | — | Iowa |
| 27 | Rosalee Lightfoot | 57 | Wife | — | Minnesota |
| 28 | Hazel Lightfoot | 28 | Daughter | — | Minnesota |
| 29 | James Lightfoot | 23 | Son | — | Wisconsin |
| 30 | Andrew Lightfoot | 20 | Son | Sewer Project | Wisconsin |
| 31 | Hugh V Robertson | 36 | Head | Confectionery B | Wisconsin |
| 32 | Alphilda Robertson | 30 | Wife | — | No Dakota |
| 33 | Robert Emery | 13 | Step-son | — | Wisconsin |
| 34 | Norman Emery | 12 | Step-son | — | Wisconsin |
| 35 | Marianna Emery | 9 | Daughter | — | Wisconsin |
| 36 | Grace Embertson | 38 | Head | — | Wisconsin |
| 37 | Ardis Embertson | 12 | Daughter | — | Wisconsin |
| 38 | Alta Embertson | 7 | Daughter | — | Wisconsin |
| 39 | Mary Ann Stetzer | 16 | Daughter | — | Wisconsin |
| 40 | Douglas Stetzer | 16 | Son-in-law | — | Wisconsin |
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)