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James Mcgrath — 1940 US Census Record
Model Tree available1940 United States Federal Census · Hudson-County, New Jersey
Our Model Tree links this James Mcgrath across the 1920, 1930 and 1940 US Censuses in Hudson-County, New Jersey (XGBoost, ~Confirmed), with identified parents Frank & Frank — first a son (b.~1919), then head of a 3-person household.
Age 21
b. ~1919
Male
Son
Born: New Jersey
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Hudson-County, New Jersey |
| Surname | McGrath |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Jersey City |
| 1935 Residence (County) | Hudson |
| Additional Details | |
| Occupation | New Worker |
| Class of Worker | PW |
| Hours Worked | 3 |
| Income (1939) | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | New Worker |
| Township / Ward | Jersey City |
| Est. Birth Year | ~1919 |
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 James | Age | Birth yr |
|---|---|---|---|---|
| Helen Mcgrath | Head | — | 40 | ~1900 |
| Frank Mcgrath | Son | — | 20 | ~1920 |
| James Mcgrath | Son | — | 21 | ~1919 |
Census Appearances
1920
Hudson, New …
Son, age 1
Hudson, New Jersey · implied b. ~1919 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McGrath |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Occupation | none |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1930
Hudson, New …
Son, age 11
Hudson, New Jersey · implied b. ~1919 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McGrath |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Hudson-County, New …
Son, age 21
Hudson-County, New Jersey · implied b. ~1919 — 3 household members
| Surname | McGrath |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Jersey City |
| 1935 Residence (County) | Hudson |
| Occupation | New Worker |
| Class of Worker | PW |
| Hours Worked | 3 |
| Income (1939) | 0 |
| Highest Grade | H 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 James Mcgrath across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Frank Mcgrath (~0.92 confidence) and father Frank Mcgrath (~0.92 confidence) and mother Helen Mcgrath (~0.92 confidence) and mother Helen Mcgrath (~0.92 confidence) and mother Helen Mcgrath (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Frank Mcgrath
b. ~1895
Source father
● Household
· direct · ~0.92
Father
Frank Mcgrath
b. ~1898
Source father
● Household
· direct · ~0.92
Mother
Helen Mcgrath
b. ~1898
Source mother
● Household
· direct · ~0.92
Mother
Helen Mcgrath
b. ~1900
Source mother
● Household
· direct · ~0.92
Mother
Helen Mcgrath
b. ~1900
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Mcgrath
Son · 1940 · age 21 · b. ~1919 · New Jersey
★ You are viewing this record
Sibling
Frank Mcgrath
Sibling · 1940 · age 20
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
39 people indexed on this census page (nara:1940:m-t0627-02401-00441)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | William Fitzgerald | 45 | Head | Fireman | New Jersey |
| 2 | Anna Fitzgerald | 40 | Wife | — | Eire |
| 3 | Mary Fitzgerald | 17 | Daughter | — | New Jersey |
| 4 | Teresa Fitzgerald | 12 | Daughter | — | New Jersey |
| 5 | Dorothy Fitzgerald | 6 | Daughter | — | New Jersey |
| 6 | Helen Mcgrath | 40 | Head | Waitress | New Jersey |
| 7 | James Mcgrath THIS PERSON | 21 | Son | New Worker | New Jersey |
| 8 | Frank Mcgrath | 20 | Son | New Worker | New Jersey |
| 9 | William Lawlor | 44 | Head | Watchman | New Jersey |
| 10 | Adeline Lawlor | 47 | Wife | — | New Jersey |
| 11 | James Lawlor | 21 | Son | Clerk | New Jersey |
| 12 | Ethel Lawlor | 19 | Daughter | Matron | New Jersey |
| 13 | William Jr. Lawlor | 17 | Son | New Worker | New Jersey |
| 14 | John Lawlor | 14 | Son | — | New Jersey |
| 15 | Edward Lawlor | 13 | Son | — | New Jersey |
| 16 | Grace Lawlor | 10 | Daughter | — | New Jersey |
| 17 | Adeline Lawlor | 8 | Daughter | — | New Jersey |
| 18 | Thomas Lawlor | 5 | Son | — | New Jersey |
| 19 | Joseph Lawlor | 4 | Son | — | New Jersey |
| 20 | Michael Lawlor | 1 | Son | — | New Jersey |
| 21 | James Berry | 29 | Head | Checker | New Jersey |
| 22 | Wanda Berry | 27 | Wife | — | New Jersey |
| 23 | Joan Berry | 5 | Daughter | — | New Jersey |
| 24 | James Berry | 2 | Son | — | New Jersey |
| 25 | Mary Walsh | 44 | Head | — | New Jersey |
| 26 | Rita Walsh | 23 | Daughter | Packer | New Jersey |
| 27 | Michael Walsh | 21 | Son | New Worker | New Jersey |
| 28 | Roger Walsh | 19 | Daughter|Son | Laborer | New Jersey |
| 29 | John Walsh | 17 | Son | Ditch Digger | New Jersey |
| 30 | Bernice Walsh | 2 | Daughter | — | New Jersey |
| 31 | Catherine Berry | 49 | Head | — | New Jersey |
| 32 | William Walsh | 25 | Boarder | Clerk | New Jersey |
| 33 | Catherine Walsh | 23 | Daughter | — | New Jersey |
| 34 | Edward Walsh | 2 | Boarder | — | New Jersey |
| 35 | Judith Walsh | 0 | Boarder | — | New Jersey |
| 36 | Richard Tarrant | 65 | Head | Watchman | Eire |
| 37 | Bridget Tarrant | 64 | Wife | — | Eire |
| 38 | James Carroll | 40 | Head | Fireman | New Jersey |
| 39 | Mary Carroll | 38 | Wife | — | New Jersey |
Pedigree Summary
James + 1 sibling
Gen 1 · 5 parents
~0.92
Max depth 4 (1900–1950 window)
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)