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Mary Mcdermott — 1940 US Census Record
Model Tree available1940 United States Federal Census · Union-County, New Jersey
Our Model Tree links this Mary Mcdermott across the 1920, 1930 and 1940 US Censuses in Union-County, New Jersey (XGBoost, ~Confirmed), with identified parents Elizabeth — first a daughter (b.~1896), then head of a 3-person household.
Age 44
b. ~1896
Female
Daughter
Born: New Jersey
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Union-County, New Jersey |
| Surname | McDermott |
| Given Name | Mary S. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 44 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Elizabeth City |
| 1935 Residence (County) | Union |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | C-5 |
| 1935 Residence | Same place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Township / Ward | Elizabeth City |
| Est. Birth Year | ~1896 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Mcdermott | Daughter | — | 44 | ~1896 |
| Henry Mcdermott | Daughter | — | 53 | ~1887 |
| Elizabeth Mcdermott | Head | — | 83 | ~1857 |
Census Appearances
1920
Union, New …
Other, age 23
Union, New Jersey · implied b. ~1897 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDermott |
| Given Name | Mary J. |
| Relationship to Head | daughter-in-law |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Married |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Occupation | loader |
| Industry | High Dept. |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1930
Union, New …
Other, age 33
Union, New Jersey · implied b. ~1897 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDermott |
| Given Name | Mary A. |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | New Jersey |
| Age at First Marriage | 21 |
| 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
Union-County, New …
Daughter, age 44
Union-County, New Jersey · implied b. ~1896 — 3 household members
| Surname | McDermott |
| Given Name | Mary S. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 44 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Elizabeth City |
| 1935 Residence (County) | Union |
| Class of Worker | 0 |
| Highest Grade | C-5 |
| 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 Mcdermott across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Elizabeth Mcdermott (~0.92 confidence). The pedigree spans 1 generation with 1 identified ancestor.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Elizabeth Mcdermott
b. ~1857
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Mcdermott
Daughter · 1940 · age 44 · b. ~1896 · New Jersey
★ You are viewing this record
Sibling
Henry Mcdermott
Sibling · 1940 · age 53
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 — Union-County, New Jersey
Open full size
1940 US Federal Census — Union-County, New Jersey
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02400-00199)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Elizabeth Mcdermott | 83 | Head | — | New Jersey |
| 2 | Mary S. Mcdermott THIS PERSON | 44 | Daughter | — | New Jersey |
| 3 | Henry H. Mcdermott | 53 | Daughter | — | New Jersey |
| 4 | John Fitzpatrick | 35 | Head | Caretaker | New Jersey |
| 5 | Mary Fitzpatrick | 27 | Wife | — | Oklahoma |
| 6 | Wesley Fitzpatrick | 5 | Son | — | Oklahoma |
| 7 | Lillian Lavalette | 26 | Lodger | Clerk | Massachusetts |
| 8 | Sandra Lavalette | 2 | Lodger | — | New Jersey |
| 9 | Chester Juredine | 30 | Lodger | Chemist | Syria |
| 10 | Sandra Juredine | 25 | Wife | Clerk | Massachusetts |
| 11 | Lillian Lila Juredine | 4 | Daughter | — | New Jersey |
| 12 | Patricia Ann Juredine | 2 | Daughter | — | New Jersey |
| 13 | Vaughn Scott | 27 | Lodger | Electrician | Pennsylvania |
| 14 | Betty Scott | 25 | Wife | Practical Nurse | Pennsylvania |
| 15 | Douglas J. Scott | 1 | Son | — | Pennsylvania |
| 16 | Betty J. Scott | 0 | Daughter | — | Pennsylvania |
| 17 | Oscar Carughi | 56 | Lodger | Machinist | Alabama |
| 18 | Iona Carughi | 52 | Wife | — | Alabama |
| 19 | Myrtle Carughi | 15 | Daughter | — | Alabama |
| 20 | Jalee Carughi | 11 | Daughter | — | North Carolina |
| 21 | George Lambert | 34 | Lodger | Machinist | Massachusetts |
| 22 | Rosemary Lambert | 24 | Wife | — | New Jersey |
| 23 | Joseph Ann Lambert | 3 | Daughter | — | New Jersey |
| 24 | Mary Ann Fitzpatrick | 19 | Sister | Saleslady | Tennessee |
| 25 | Richard Higgins | 33 | Head | Funeral Director | New Jersey |
| 26 | Edna Higgins | 24 | Wife | — | New Jersey |
| 27 | George Forrester | 30 | Head | Fireman | Scotland |
| 28 | Helen Forrester | 30 | Wife | — | New Jersey |
| 29 | George J. Forrester | 6 | Son | — | New Jersey |
| 30 | James Bain | 36 | Lodger | Machinist | Scotland |
| 31 | Robina Bain | 31 | Wife | — | Scotland |
| 32 | Rachael Panther | 52 | Lodger | Interior Decorator | New Jersey |
| 33 | Margie Sheeder | 32 | Lodger | Housekeeper | Massachusetts |
| 34 | Harry Hughes | 31 | Lodger | Machinist | Holland |
| 35 | Eilert Johnston | 29 | Lodger | Carpenter | Norway |
| 36 | Carl W. Kapp | 36 | Head | Doctor | Pennsylvania |
| 37 | Julia V. Kapp | 35 | Wife | — | New Jersey |
| 38 | Jessie Voorhees | 71 | Mother-in-law | — | Pennsylvania |
| 39 | Laura Barrett | 45 | Housekeeper | Housekeeper | Canada |
| 40 | Carl V. Kapp | 7 | Son | — | Pennsylvania |
Pedigree Summary
Mary + 1 sibling
Gen 1 · 1 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)