MC
Mary Campbell — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Jackson-County, Missouri
Our Model Tree links this Mary Campbell across the 1920, 1930 and 1940 US Censuses in Jackson-County, Missouri (XGBoost, ~Confirmed) — first a spouse (b.~1883), then head of a 4-person household.
Age 57
b. ~1883
Female
Spouse
Born: Ireland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Jackson-County, Missouri |
| Surname | Campbell |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 57 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | Kansas City |
| 1935 Residence (County) | Jackson |
| Naturalization Status | Naturalized |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | No 10 |
| 1935 Residence | Same place |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Township / Ward | Kansas City |
| Est. Birth Year | ~1883 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| John Campbell | Head | — | 63 | ~1877 |
| John Campbell | Son | — | 26 | ~1914 |
| Edward Campbell | Son | — | 25 | ~1915 |
| Mary Campbell | Spouse | — | 57 | ~1883 |
Census Appearances
1920
Jackson, Missouri
Spouse, age 38
Jackson, Missouri · implied b. ~1882 — 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 | 38 |
| Marital Status | Married |
| Birthplace | Ireland |
| Year of Immigration | 1901 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | packer |
| Industry | packing house |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1930
Jackson, Missouri
Other, age 48
Jackson, Missouri · implied b. ~1882 — 5 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 | 48 |
| Marital Status | Married |
| Birthplace | Ireland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1900 |
| Age at First Marriage | 26 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Mother Tongue | Irish |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1940
Jackson-County, Missouri
Spouse, age 57
Jackson-County, Missouri · implied b. ~1883 — 4 household members
| Surname | Campbell |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 57 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | Kansas City |
| 1935 Residence (County) | Jackson |
| Naturalization Status | Naturalized |
| Income (1939) | 0 |
| Highest Grade | No 10 |
| 1935 Residence | Same place |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
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.
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This person
Anchor record
Mary Campbell
Spouse · 1940 · age 57 · b. ~1883 · Missouri
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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 — Jackson-County, Missouri
Open full size
1940 US Federal Census — Jackson-County, Missouri
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02167-00542)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Dora Bolton | 66 | Head | — | Missouri |
| 42 | Robert Bolton | 44 | Son | Switchman | Missouri |
| 43 | Mathew Bourke | 54 | Head | Laborer | Wisconsin |
| 44 | Margaret M. Bourke | 42 | Wife | — | Missouri |
| 45 | Frank M. Bourke | 23 | Son | Editorial Work | Missouri |
| 46 | Regina Bourke | 16 | Daughter | — | Missouri |
| 47 | Mary Rita Bourke | 12 | Daughter | — | Missouri |
| 48 | Jacob H. Laughmiller | 49 | Head | Steam Fitter | Kansas |
| 49 | Rose Laughmiller | 42 | Wife | — | Missouri |
| 50 | Henry E. Bucher | 73 | Father-in-law | — | Michigan |
| 51 | Bridget Houlihan | 64 | Lodger | — | Ireland |
| 52 | Lester Machany | 25 | Head | Expressman | Missouri |
| 53 | Betty Machany | 22 | Wife | — | Missouri |
| 54 | William Shadon | 23 | Head | — | Kentucky |
| 55 | Clara Bell Shadon | 21 | Wife | — | Indiana |
| 56 | Annie Tate | 75 | Head | — | Germany |
| 57 | Edward Eales | 56 | Son | Baker | Missouri |
| 58 | George Eales | 14 | Grand-son | — | Missouri |
| 59 | Anna Belle Eales | 11 | Grand-daughter | — | Missouri |
| 60 | Charles V. Runions | 24 | Head | Laborer | Missouri |
| 61 | Lois Runions | 20 | Wife | — | Oklahoma |
| 62 | Ann Jeanette Runions | 3 | Daughter | — | Missouri |
| 63 | Donna Marie Runions | 2 | Daughter | — | Missouri |
| 64 | Charles V. Jr. Runions | 0 | Son | — | Missouri |
| 65 | John Campbell | 63 | Head | Laborer | Ireland |
| 66 | Mary Campbell THIS PERSON | 57 | Wife | — | Ireland |
| 67 | John Campbell | 26 | Son | Clerical | Missouri |
| 68 | Edward Campbell | 25 | Son | Mail Handler | Missouri |
| 69 | Emmett Johnson | 32 | Head | Laborer | Missouri |
| 70 | Hazel Johnson | 32 | Wife | Saleslady | Missouri |
| 71 | Emmett Johnson | 10 | Son | — | Kansas |
| 72 | George Johnson | 5 | Son | — | Kansas |
| 73 | William R. Bagby | 37 | Head | Mechanic | Missouri |
| 74 | Flora Bagby | 34 | Wife | — | Kansas |
| 75 | Willa Jean Bagby | 14 | Daughter | — | Missouri |
| 76 | Wanda Jean Bagby | 13 | Daughter | — | Missouri |
| 77 | Carrie Louise Bagby | 12 | Daughter | — | Missouri |
| 78 | Myrtle Marie Bagby | 6 | Daughter | — | Kansas |
| 79 | William F. Bagby | 3 | Son | — | Kansas |
| 80 | John Pfeiffer | 42 | Head | Laborer | Missouri |
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)