MH
Mary Hart — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Hudson-County, New Jersey
Our Model Tree links this Mary Hart across the 1930 and 1940 US Censuses in Hudson-County, New Jersey (XGBoost, ~Confirmed) — first a daughter (b.~1912), then head of a 12-person household.
Age 28
b. ~1912
Female
Daughter
Born: New Jersey
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Hudson-County, New Jersey |
| Surname | Hart |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Jersey City |
| 1935 Residence (County) | Hudson |
| Additional Details | |
| Occupation | Clerk |
| Industry | Bakery Corp. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1300 |
| Highest Grade | C-4 |
| 1935 Residence | Same place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Clerk |
| Township / Ward | Jersey City |
| Est. Birth Year | ~1912 |
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.
12 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Ann Hart | Daughter | — | 21 | ~1919 |
| Mary Hart | Daughter | — | 28 | ~1912 |
| Theresa Hart | Daughter | — | 14 | ~1926 |
| Dorothy Hart | Daughter | — | 16 | ~1924 |
| Rita Hart | Daughter | — | 18 | ~1922 |
| Kathleen Hart | Daughter | — | 33 | ~1907 |
| Dominick Hart | Head | — | 58 | ~1882 |
| John Hart | Son | — | 22 | ~1918 |
| Dominic Hart | Son | — | 31 | ~1909 |
| Francis Hart | Son | — | 29 | ~1911 |
| Joseph Hart | Son | — | 26 | ~1914 |
| Katherine Hart | Spouse | — | 53 | ~1887 |
Census Appearances
1930
Hudson, New …
Daughter, age 18
Hudson, New Jersey · implied b. ~1912 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hart |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Scotland |
| Occupation | typist |
| Industry | insurance |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Hudson-County, New …
Daughter, age 28
Hudson-County, New Jersey · implied b. ~1912 — 12 household members
| Surname | Hart |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Jersey City |
| 1935 Residence (County) | Hudson |
| Occupation | Clerk |
| Industry | Bakery Corp. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1300 |
| Highest Grade | C-4 |
| 1935 Residence | Same place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
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 Hart across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Hart
Daughter · 1940 · age 28 · b. ~1912 · New Jersey
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Sibling
Dominic Hart
Sibling · 1940 · age 31
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Theresa Hart
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Hart
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Kathleen Hart
Sibling · 1940 · age 33
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Hart
Sibling · 1940 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Francis Hart
Sibling · 1940 · age 29
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rita Hart
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Hart
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ann Hart
Sibling · 1940 · age 21
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 — Hudson-County, New Jersey
Open full size
1940 US Federal Census — Hudson-County, New Jersey
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02404-00250)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Anna O'Shea | 21 | Head | Asst. Investigator | New Jersey |
| 42 | Elizabeth O'Shea | 24 | Sister | — | New Jersey |
| 43 | John Graham | 56 | Lodger | — | New Jersey |
| 44 | James Franey | 36 | Head | Stenographer | New Jersey |
| 45 | Margaret Franey | 36 | Wife | — | New Jersey |
| 46 | Rose M. Franey | 8 | Daughter | — | New Jersey |
| 47 | Doris Franey | 5 | Daughter | — | New Jersey |
| 48 | James J. Franey | 4 | Son | — | New Jersey |
| 49 | Gerard Franey | 1 | Son | — | New Jersey |
| 50 | Margaret Gilmartin | 57 | Head | — | Irish Free State |
| 51 | Mary Gilmartin | 31 | Daughter | Stenographer | New Jersey |
| 52 | Edward Gilmartin | 24 | Son | Helper | New Jersey |
| 53 | Peter Gilmartin | 21 | Son | Paper Machine | New Jersey |
| 54 | Richard Stock | 62 | Head | Motorman | Germany |
| 55 | Anne Stock | 60 | Wife | — | Germany |
| 56 | Marion Stock | 24 | Daughter | Office Clerk | New Jersey |
| 57 | Gerhard Borst | 28 | Head | Plumber | Holland |
| 58 | Boyd Borst | 0 | Son | — | New Jersey |
| 59 | Louisa Warning | 59 | Head | — | Pennsylvania |
| 60 | Henry Warning | 30 | Nephew | Assembler | New Jersey |
| 61 | Dominick Hart | 58 | Head | Stillman | Irish Free State |
| 62 | Katherine Hart | 53 | Wife | — | Irish Free State |
| 63 | Kathleen Hart | 33 | Daughter | Clerk | New Jersey |
| 64 | Dominic Hart | 31 | Son | Lawyer | New Jersey |
| 65 | Francis Hart | 29 | Son | — | New Jersey |
| 66 | Mary Hart THIS PERSON | 28 | Daughter | Clerk | New Jersey |
| 67 | Joseph Hart | 26 | Son | Investigator | New Jersey |
| 68 | John Hart | 22 | Son | — | New Jersey |
| 69 | Ann Hart | 21 | Daughter | — | New Jersey |
| 70 | Rita Hart | 18 | Daughter | — | New Jersey |
| 71 | Dorothy Hart | 16 | Daughter | — | New Jersey |
| 72 | Theresa Hart | 14 | Daughter | — | New Jersey |
| 73 | Richard Barrett | 48 | Head | Maintenance | New Jersey |
| 74 | Margaret Barrett | 45 | Wife | — | New Jersey |
| 75 | Margaret Barrett | 20 | Daughter | Operator | New Jersey |
| 76 | Blanche Barrett | 16 | Daughter | — | New Jersey |
| 77 | Robert Smith | 33 | Head | — | New York |
| 78 | Jennie Smith | 68 | Wife | — | New Jersey |
| 79 | Robert Herman Smith | 33 | Son | Draftsman | New Jersey |
| 80 | Robert Louis Smith | 28 | Son | Secretary | New Jersey |
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)