MS
Mary Sullivan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Union-County, New Jersey
Our Model Tree links this Mary Sullivan across the 1920, 1930 and 1940 US Censuses in Union-County, New Jersey (XGBoost, ~Confirmed), with identified parents William & Mary — first a daughter (b.~1908), then head of a 3-person household.
Age 32
b. ~1908
Female
Daughter
Born: New Jersey
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Union-County, New Jersey |
| Surname | Sullivan |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 32 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Elizabeth City |
| 1935 Residence (County) | Union |
| Additional Details | |
| Class of Worker | No |
| Highest Grade | No 8 |
| 1935 Residence | Same house |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Township / Ward | Elizabeth City |
| Est. Birth Year | ~1908 |
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 |
|---|---|---|---|---|
| Margaret Sullivan | Daughter | — | 35 | ~1905 |
| Mary Sullivan | Daughter | — | 32 | ~1908 |
| Mary Sullivan | Head | — | 70 | ~1870 |
Census Appearances
1920
Union, New …
Daughter, age 12
Union, New Jersey · implied b. ~1908 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| 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
Union, New …
Daughter, age 22
Union, New Jersey · implied b. ~1908 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Industry | Mach Factory |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Union-County, New …
Daughter, age 32
Union-County, New Jersey · implied b. ~1908 — 3 household members
| Surname | Sullivan |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 32 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Elizabeth City |
| 1935 Residence (County) | Union |
| Class of Worker | No |
| Highest Grade | No 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 Sullivan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father William Sullivan (~0.92 confidence) and mother Mary Sullivan (~0.92 confidence) and mother Mary Sullivan (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Sullivan
b. ~1869
Source father
● Household
· direct · ~0.92
Mother
Mary Sullivan
b. ~1879
Source mother
● Household
· direct · ~0.92
Mother
Mary Sullivan
b. ~1870
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Sullivan
Daughter · 1940 · age 32 · b. ~1908 · New Jersey
★ You are viewing this record
Sibling
Margaret Sullivan
Sibling · 1940 · age 35
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
39 people indexed on this census page (nara:1940:m-t0627-02399-00145)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Julia Gray | 17 | Daughter | — | New Jersey |
| 2 | Veronica Gray | 15 | Daughter | — | New Jersey |
| 3 | Virginia Gray | 13 | Daughter | — | New Jersey |
| 4 | William Gray | 10 | Son | — | New Jersey |
| 5 | Margaret Doran | 66 | Head | — | Eire |
| 6 | Marguerite Doran | 34 | Daughter | Stenographer | New Jersey |
| 7 | Helen Doran | 26 | Daughter | Stenographer | New Jersey |
| 8 | John Keegan | 43 | Son-in-law | Inspector | Mass. |
| 9 | Anna C. Keegan | 41 | Daughter | — | New Jersey |
| 10 | Mary Bickelhaup | 41 | Daughter | — | New Jersey |
| 11 | Marie Ganly | 65 | Sister | — | New Jersey |
| 12 | Mary Sullivan | 70 | Head | — | Eire |
| 13 | Margaret Sullivan | 35 | Daughter | Stenographer | New Jersey |
| 14 | Mary Sullivan THIS PERSON | 32 | Daughter | — | New Jersey |
| 15 | Herman Darius | 65 | Head | — | Germany |
| 16 | Anna Darius | 67 | Wife | — | Germany |
| 17 | Mary E. Mueller | 61 | Head | — | Germany |
| 18 | John Menzie | 25 | Son | Mechanic | Mass. |
| 19 | Mary Menzie | 23 | Daughter-in-law | — | New Jersey |
| 20 | Patricia Menzie | 3 | Granddaughter | — | New Jersey |
| 21 | Marg. E. Menzie | 0 | Granddaughter | — | New Jersey |
| 22 | Mary Baly | 44 | Head | — | Germany |
| 23 | Mary Bolton | 41 | Daughter | Houseworker | Austria |
| 24 | Anna Dehmel | 48 | Head | Operator | Germany |
| 25 | Marie Dehmel | 17 | Daughter | — | New Jersey |
| 26 | James Aylward | 35 | Head | Foreman | New Jersey |
| 27 | Mary Aylward | 23 | Wife | — | New Jersey |
| 28 | Mary Aylward | 3 | Daughter | — | New Jersey |
| 29 | Nicholas Mazza | 39 | Head | Bus Driver | New Jersey |
| 30 | Mary Mazza | 37 | Wife | — | New Jersey |
| 31 | Harry Mazza | 37 | Brother | Bus Driver | New Jersey |
| 32 | Patrick Butella | 34 | Head | Branger | New Jersey |
| 33 | Ruth Butella | 23 | Wife | — | New Jersey |
| 34 | Patrick Jr. Butella | 2 | Son | — | New Jersey |
| 35 | Lucial Consolmagno | 43 | Head | Foreman | Italy |
| 36 | Amelia Consolmagno | 39 | Wife | — | Africa |
| 37 | Edward Hickey | 40 | Head | Electrician | New Jersey |
| 38 | Anna Hickey | 36 | Wife | — | New Jersey |
| 39 | Edward Jr. Hickey | 10 | Son | — | New Jersey |
Pedigree Summary
Mary + 1 sibling
Gen 1 · 3 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)