MC
Mary Campbell — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Pocahontas-County, Iowa
Our Model Tree links this Mary Campbell across the 1920, 1930 and 1940 US Censuses in Pocahontas-County, Iowa (XGBoost, ~Confirmed) — first a spouse (b.~1866), then head of a 3-person household.
Age 74
b. ~1866
Female
Spouse
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Pocahontas-County, Iowa |
| Surname | Campbell |
| Given Name | Mary H. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 74 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Gilmore City Town |
| 1935 Residence (County) | Pocahontas |
| Additional Details | |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Gilmore City Town |
| Est. Birth Year | ~1866 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Gladys Fuller | Daughter | — | 50 | ~1890 |
| Will Campbell | Head | — | 81 | ~1859 |
| Mary Campbell | Spouse | — | 74 | ~1866 |
Census Appearances
1920
Pocahontas, Iowa
Spouse, age 54
Pocahontas, Iowa · implied b. ~1866 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | Mary H |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 54 |
| Marital Status | Married |
| Birthplace | Illinois |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Pocahontas, Iowa
Other, age 65
Pocahontas, Iowa · implied b. ~1865 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | Mary H. |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 65 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 20 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Pocahontas-County, Iowa
Spouse, age 74
Pocahontas-County, Iowa · implied b. ~1866 — 3 household members
| Surname | Campbell |
| Given Name | Mary H. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 74 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Gilmore City Town |
| 1935 Residence (County) | Pocahontas |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Campbell
Spouse · 1940 · age 74 · b. ~1866 · Iowa
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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 — Pocahontas-County, Iowa
Open full size
1940 US Federal Census — Pocahontas-County, Iowa
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-01191-00253)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Lee E Brown | 50 | Head | Proprietor | Iowa |
| 2 | Elizabeth A Brown | 51 | Wife | — | Iowa |
| 3 | Billy Lee Brown | 11 | Son | — | Iowa |
| 4 | Sigmund J. Hage | 54 | Head | Manager | Norway |
| 5 | Norman S. Hage | 19 | Son | Printer | Iowa |
| 6 | Greta A. Hage | 16 | Daughter | — | Iowa |
| 7 | Tony G. Peters | 35 | Head | Manager | Iowa |
| 8 | F. Gail Peters | 36 | Wife | — | Iowa |
| 9 | Beverly Ann Peters | 10 | Daughter | — | Iowa |
| 10 | Will E. Campbell | 81 | Head | — | Illinois |
| 11 | Mary H. Campbell THIS PERSON | 74 | Wife | — | Illinois |
| 12 | Gladys E. Fuller | 50 | Daughter | Social Worker | Iowa |
| 13 | G. Franklin Neel | 59 | Head | Proprietor | Iowa |
| 14 | Vida G. Neel | 51 | Wife | — | Iowa |
| 15 | Ray E. Dunaway | 54 | Head | Owner And Manager | Iowa |
| 16 | Iona L. Dunaway | 22 | Daughter | — | Iowa |
| 17 | Ben C. Abben | 39 | Head | Field Manager | Iowa |
| 18 | Iona Abben | 38 | Wife | — | Iowa |
| 19 | Louise C. Viegert | 71 | Head | — | Germany |
| 20 | Albert W. Viegert | 50 | Son | Constable | Iowa |
| 21 | Lois Viegert | 20 | Daughter | Stenographer | Iowa |
| 22 | Erik L. Peterson | 42 | Head | Mechanic | Iowa |
| 23 | Christine Peterson | 43 | Wife | — | Iowa |
| 24 | Clyde A. Decker | 50 | Head | Laborer | Pennsylvania |
| 25 | Grace Decker | 43 | Wife | Saleslady | Iowa |
| 26 | Maxine Ellen Decker | 10 | Daughter | — | Iowa |
| 27 | Harriett A. Decker | 8 | Daughter | — | Iowa |
| 28 | William G. Reinders | 49 | Head | State Agent | Iowa |
| 29 | Evelyn M. Reinders | 47 | Wife | — | Wisconsin |
| 30 | Raymond Palmer | 50 | Brother-in-law | — | Wisconsin |
| 31 | Anna Cavanaugh | 57 | Maid | Maid | Iowa |
| 32 | Claude A. Peterson | 43 | Head | Foreman Carpenter | Iowa |
| 33 | Louisa M. Peterson | 40 | Wife | — | Iowa |
| 34 | Elinor L. Peterson | 19 | Daughter | Stenographer | Iowa |
| 35 | Meda M. Peterson | 15 | Daughter | — | Iowa |
| 36 | Robert D. Peterson | 9 | Son | — | Iowa |
| 37 | Joseph L. Fitzgerald | 52 | Head | Marshal | Iowa |
| 38 | Harriett K. Fitzgerald | 45 | Wife | — | Illinois |
| 39 | James W. Fitzgerald | 23 | Son | Blasting | Iowa |
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)