MF
Mary Farrell — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Hudson-County, New Jersey
Our Model Tree links this Mary Farrell across the 1920, 1930 and 1940 US Censuses in Hudson-County, New Jersey (XGBoost, ~Confirmed) — first a spouse (b.~1888), then head of a 10-person household.
Age 52
b. ~1888
Female
Spouse
Born: New Jersey
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Hudson-County, New Jersey |
| Surname | Farrell |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | New Jersey |
| 1935 Residence (City) | Jersey City |
| 1935 Residence (County) | Hudson |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | 8 |
| 1935 Residence | Same House |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Township / Ward | Jersey City |
| Est. Birth Year | ~1888 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Margaret Farrell | Daughter | — | 23 | ~1917 |
| Veronica Farrell | Daughter | — | 24 | ~1916 |
| Eleanor Farrell | Daughter | — | 28 | ~1912 |
| Dorothy Farrell | Daughter | — | 31 | ~1909 |
| Rita Farrell | Daughter | — | 26 | ~1914 |
| Joseph Farrell | Head | — | 56 | ~1884 |
| Francis Farrell | Son | — | 18 | ~1922 |
| Joan Farrell | Son | — | 13 | ~1927 |
| Joseph Farrell | Son | — | 20 | ~1920 |
| Mary Farrell | Spouse | — | 52 | ~1888 |
Census Appearances
1920
Hudson, New …
Spouse, age 32
Hudson, New Jersey · implied b. ~1888 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Farrell |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | New Jersey |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1930
Hudson, New …
Spouse, age 42
Hudson, New Jersey · implied b. ~1888 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Farrell |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | New Jersey |
| Age at First Marriage | 18 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Housewife |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Hudson-County, New …
Spouse, age 52
Hudson-County, New Jersey · implied b. ~1888 — 10 household members
| Surname | Farrell |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | New Jersey |
| 1935 Residence (City) | Jersey City |
| 1935 Residence (County) | Hudson |
| Income (1939) | 0 |
| Highest Grade | 8 |
| 1935 Residence | Same House |
| 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 Farrell 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 Farrell
Spouse · 1940 · age 52 · b. ~1888 · New Jersey
★ You are viewing this record
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-t0627-02407-00072)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Daniel Jr. Swartz | 45 | Head | Mechanic | New York |
| 2 | Anna Swartz | 48 | Wife | — | New Jersey |
| 3 | Clare Swartz | 21 | Daughter | Garton | New Jersey |
| 4 | Mary Swartz | 19 | Daughter | Operator | New Jersey |
| 5 | Daniel Iii Swartz | 16 | Son | — | New Jersey |
| 6 | Daniel Sr. Swartz | 74 | Father | — | New York |
| 7 | Mabel Swartz | 73 | Mother | Counter Clerk | New York |
| 8 | Catherine Fitzpatrick | 55 | Sister-in-law | — | New Jersey |
| 9 | Marcella Fagan | 76 | Lodger | — | Eire |
| 10 | John Carmody | 56 | Head | Foreman | Pennsylvania |
| 11 | Anastasia Carmody | 52 | Wife | — | Pennsylvania |
| 12 | John Jr. Carmody | 21 | Son | Utility Man | Pennsylvania |
| 13 | James Carmody | 19 | Son | — | New Jersey |
| 14 | Margaret Carmody | 16 | Daughter | — | New Jersey |
| 15 | Catherine Crosson | 61 | Sister-in-law | — | Pennsylvania |
| 16 | Sue Crosson | 60 | Sister-in-law | — | Pennsylvania |
| 17 | Edward Crosson | 53 | Brother-in-law | Air Inspector | Pennsylvania |
| 18 | Joseph Mastrogiacomo | 44 | Head | Laborer | Italy |
| 19 | Rose Mastrogiacomo | 40 | Wife | — | New Jersey |
| 20 | Lucretia Mastrogiacomo | 18 | Daughter | Typist | New Jersey |
| 21 | Bernadette Mastrogiacomo | 15 | Daughter | — | New Jersey |
| 22 | Francis Mastrogiacomo | 10 | Son | — | New Jersey |
| 23 | Claire Belasco | 35 | Sister-in-law | Secretary | New Jersey |
| 24 | Joseph Farrell | 56 | Head | Maintenance | New Jersey |
| 25 | Mary Farrell THIS PERSON | 52 | Wife | — | New Jersey |
| 26 | Dorothy Farrell | 31 | Daughter | Stenographer | New Jersey |
| 27 | Eleanor Farrell | 28 | Daughter | Stenographer | New Jersey |
| 28 | Rita Farrell | 26 | Daughter | Stenographer | New Jersey |
| 29 | Veronica Farrell | 24 | Daughter | Stenographer | New Jersey |
| 30 | Margaret Farrell | 23 | Daughter | Operator | New Jersey |
| 31 | Joseph Farrell | 20 | Son | Packer | New Jersey |
| 32 | Francis Farrell | 18 | Son | — | New Jersey |
| 33 | Joan Farrell | 13 | Son | — | New Jersey |
| 34 | Matthew Clark | 47 | Head | Policeman | New Jersey |
| 35 | Sophie Clark | 42 | Wife | — | New Jersey |
| 36 | Anna Heiland | 62 | Mother-in-law | — | New Jersey |
| 37 | Hugh Fitzpatrick | 56 | Head | Boiler Maker | New Jersey |
| 38 | Nellie Fitzpatrick | 51 | Wife | — | New Jersey |
| 39 | Helen Fitzpatrick | 20 | Daughter | — | New Jersey |
| 40 | Hugh Jr. Fitzpatrick | 15 | Son | — | New Jersey |
Related Census Records
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)