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John Mccarthy — 1940 US Census Record
Model Tree available1940 United States Federal Census · Hudson-County, New Jersey
Our Model Tree links this John Mccarthy across the 1920, 1930 and 1940 US Censuses in Hudson-County, New Jersey (XGBoost, ~Confirmed), with identified parents John & Mary — first a son (b.~1919), then head of a 4-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 | MCCARTHY |
| Given Name | JOHN |
| 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 | Bank Messenger |
| Industry | ENGINEERING |
| Class of Worker | PW |
| Hours Worked | 38 |
| Income (1939) | 1100 |
| Highest Grade | H-4 |
| 1935 Residence | Same Place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Bank Messenger |
| 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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Rose Mccarthy | Head | — | 46 | ~1894 |
| Daniel Mccarthy | Son | — | 18 | ~1922 |
| John Mccarthy | Son | — | 21 | ~1919 |
| Robert Mccarthy | Son | — | 9 | ~1931 |
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 | McCarthy |
| Given Name | John |
| 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 |
| Speaks English | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1930
Hudson, New …
Son, age 11
Hudson, New Jersey · implied b. ~1919 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCarthy |
| Given Name | John |
| 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 — 4 household members
| Surname | MCCARTHY |
| Given Name | JOHN |
| 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 | Bank Messenger |
| Industry | ENGINEERING |
| Class of Worker | PW |
| Hours Worked | 38 |
| Income (1939) | 1100 |
| 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 John Mccarthy across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Mccarthy (~0.92 confidence) and mother Mary Mccarthy (~0.92 confidence) and father Matthew Mccarthy (~0.92 confidence) and mother Rose Mccarthy (~0.92 confidence) and mother Mary Mccarthy (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Mccarthy
b. ~1889
Source father
● Household
· direct · ~0.92
Mother
Mary Mccarthy
b. ~1892
Source mother
● Household
· direct · ~0.92
Father
Matthew Mccarthy
b. ~1894
Source father
● Household
· direct · ~0.92
Mother
Rose Mccarthy
b. ~1894
Source mother
● Household
· direct · ~0.92
Mother
Mary Mccarthy
b. ~1897
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Mccarthy
Son · 1940 · age 21 · b. ~1919 · New Jersey
★ You are viewing this record
Sibling
Daniel Mccarthy
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Mccarthy
Sibling · 1940 · age 9
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
32 people indexed on this census page (nara:1940:m-t0627-02406-00497)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Agnes Komorowski | 35 | WIFE | — | New Jersey |
| 2 | Raymond Komorowski | 14 | SON | — | New Jersey |
| 3 | Robert Komorowski | 12 | SON | — | New Jersey |
| 4 | Mary Cieciuch | 76 | MOTHER IN LAW | — | Poland |
| 5 | Herman Firstenberg | 44 | HEAD | Manager | Poland |
| 6 | Elizabeth Firstenberg | 43 | WIFE | Bookkeeper | New Jersey |
| 7 | Elaine A. Firstenberg | 12 | DAUGHTER | — | New Jersey |
| 8 | Marcia Firstenberg | 8 | DAUGHTER | — | New Jersey |
| 9 | Ann Johnson | 18 | KEEPER | House Keeper | New Jersey |
| 10 | Margaret Sullivan | 62 | HEAD | — | New Jersey |
| 11 | Kathleen Sullivan | 34 | HEAD | — | New Jersey |
| 12 | John Sullivan | 37 | HUSBAND | Guard | New Jersey |
| 13 | Joseph Bannon | 35 | BROTHER IN LAW | Timekeeper | New York |
| 14 | Joseph Bannon | 13 | NEPHEW | — | New Jersey |
| 15 | William Corydon | 39 | HEAD | Foreman | New Jersey |
| 16 | Florence Corydon | 39 | WIFE | — | New Jersey |
| 17 | William Corydon | 15 | SON | — | New Jersey |
| 18 | Mary Fitzgerald | 46 | HEAD | Teacher | New Jersey |
| 19 | Edward Fitzgerald | 47 | Brother | Salesman | New Jersey |
| 20 | John Fitzgerald | 42 | Brother | Pipe Fitter | New Jersey |
| 21 | Robert Fitzgerald | 46 | Brother | Dentist | New Jersey |
| 22 | Helen O'Neill | 26 | Cousin | Teacher | New Jersey |
| 23 | Rose Mccarthy | 46 | Head | Telephone Operator | New Jersey |
| 24 | John Mccarthy THIS PERSON | 21 | Son | Bank Messenger | New Jersey |
| 25 | Daniel Mccarthy | 18 | Son | — | New Jersey |
| 26 | Robert Mccarthy | 9 | Son | — | New Jersey |
| 27 | William Rott | 44 | Head | Chauffeur | New Jersey |
| 28 | Belle Rott | 42 | WIFE | — | New Jersey |
| 29 | Emily Rott | 24 | Daughter | Stenographer | New Jersey |
| 30 | Marguerite Rott | 20 | Daughter | Stenographer | New Jersey |
| 31 | William Rott | 17 | Son | Mechanic | New Jersey |
| 32 | Isabelle Rott | 5 | Daughter | — | New Jersey |
Pedigree Summary
John + 2 siblings
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)