MH
Mary Hill — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Union-County, New Jersey
Our Model Tree links this Mary Hill across the 1920, 1930 and 1940 US Censuses in Union-County, New Jersey (XGBoost, ~Confirmed) — first a spouse (b.~1883), then head of a 4-person household.
Age 57
b. ~1883
Female
Spouse
Born: Finland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Union-County, New Jersey |
| Surname | Hill |
| Given Name | Mary S. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 57 |
| Marital Status | Married |
| Birthplace | Finland |
| 1935 Residence (City) | Clark Township |
| 1935 Residence (County) | Union |
| Naturalization Status | Naturalized |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth Country | Finland |
| Birthplace (normalized) | finland |
| Township / Ward | Clark Township |
| Est. Birth Year | ~1883 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Mildred Hill | Daughter | — | 27 | ~1913 |
| Gertrude Hill | Daughter | — | 25 | ~1915 |
| John Hill | Head | — | 60 | ~1880 |
| Mary Hill | Spouse | — | 57 | ~1883 |
Census Appearances
1920
Union, New …
Spouse, age 37
Union, New Jersey · implied b. ~1883 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hill |
| Given Name | Mary S. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Finland |
| Year of Immigration | 1902 |
| Naturalization Status | First papers filed |
| Father's Birthplace | Finland |
| Mother's Birthplace | Finland |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Finnish |
| Birth Country | Finland |
| Birthplace (normalized) | finland |
1930
Union, New …
Spouse, age 46
Union, New Jersey · implied b. ~1884 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hill |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Finland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1901 |
| Age at First Marriage | 21 |
| Father's Birthplace | Finland |
| Mother's Birthplace | Finland |
| Occupation | none |
| Can Read/Write | Yes |
| Mother Tongue | Finnish |
| Birth Country | Finland |
| Birthplace (normalized) | finland |
1940
Union-County, New …
Spouse, age 57
Union-County, New Jersey · implied b. ~1883 — 4 household members
| Surname | Hill |
| Given Name | Mary S. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 57 |
| Marital Status | Married |
| Birthplace | Finland |
| 1935 Residence (City) | Clark Township |
| 1935 Residence (County) | Union |
| Naturalization Status | Naturalized |
| Income (1939) | 0 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth Country | Finland |
| Birthplace (normalized) | finland |
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 Hill 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 Hill
Spouse · 1940 · age 57 · b. ~1883 · New Jersey
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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-t0627-02385-00038)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Willard Shaffer | 49 | Head | Plumber | Pennsylvania |
| 2 | Janet Shaffer | 42 | Wife | — | New Jersey |
| 3 | Janet Shaffer | 13 | Daughter | — | New Jersey |
| 4 | Peter Kroll | 44 | Brother | Garage Business | New Jersey |
| 5 | John P. Hill | 60 | Head | Carpenter | Finland |
| 6 | Mary S. Hill THIS PERSON | 57 | Wife | — | Finland |
| 7 | Mildred Hill | 27 | Daughter | Secretary | New Jersey |
| 8 | Gertrude Hill | 25 | Daughter | Nurse Registered | New Jersey |
| 9 | Clarence Maurer | 57 | Head | Watchman | Pennsylvania |
| 10 | Viola Maurer | 52 | Wife | — | Pennsylvania |
| 11 | Walter Wolf | 25 | Head | Salesman | Pennsylvania |
| 12 | Viola Wolf | 20 | Wife | — | New Jersey |
| 13 | Viola Wolf | 0 | Daughter | — | New Jersey |
| 14 | Bertha Bortinger | 19 | Sister | Operator | New Jersey |
| 15 | George J. Smith | 34 | Head | Watchman | Alabama |
| 16 | Nora Smith | 25 | Wife | House Work | No. Carolina |
| 17 | Michael Sobel | 47 | Lodger | Porter | Poland |
| 18 | Jacob Peter | 39 | Head | Manager | New Jersey |
| 19 | Bertha Peter | 33 | Wife | — | New Jersey |
| 20 | Ross Kroll | 40 | Head | — | New Jersey |
| 21 | Dorothy D. Kroll | 17 | Daughter | — | New Jersey |
| 22 | Rose M. Kroll | 15 | Daughter | — | New Jersey |
| 23 | Phillip L. Kroll | 13 | Son | — | New Jersey |
| 24 | Joseph P. Kroll | 4 | Son | — | New Jersey |
| 25 | Michael Menafra | 45 | Brother | — | New Jersey |
| 26 | Gustave Chester | 39 | Head | Gardner | France |
| 27 | Gladys Chester | 35 | Wife | — | New York |
| 28 | George Chester | 19 | Son | — | New Jersey |
| 29 | James Chester | 17 | Son | — | New Jersey |
| 30 | John M. Mullens | 44 | Head | — | New Jersey |
| 31 | Mary D. Mullens | 38 | Wife | Registered Nurse | New York |
| 32 | Ralph J. Stard | 23 | Head | Chem. Operator | No. Carolina |
| 33 | Mary A. Stard | 23 | Wife | — | No. Carolina |
| 34 | Carolyn Stard | 0 | Daughter | — | New Jersey |
| 35 | Judith Stard | 0 | Daughter | — | New Jersey |
| 36 | Fred Bauer | 36 | Head | Machinist | Germany |
| 37 | Lillian Bauer | 32 | Wife | — | New Jersey |
| 38 | Lillian Bauer | 9 | Daughter | — | New Jersey |
| 39 | Kathleen Bauer | 8 | Daughter | — | New Jersey |
| 40 | Fred Jr. Bauer | 7 | 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)