JK
John Kirk — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Union-County, New Jersey
Our Model Tree links this John Kirk across the 1930 and 1940 US Censuses in Union-County, New Jersey (XGBoost, ~Confirmed) — first a head (b.~1907), then head of a 6-person household.
Age 33
b. ~1907
Male
Head
Born: New Jersey
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Union-County, New Jersey |
| Surname | Kirk |
| Given Name | John A. |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | New Jersey |
| 1935 Residence (City) | Elizabeth City |
| 1935 Residence (County) | Union |
| Additional Details | |
| Occupation | plumbing inspector |
| Industry | city engineer |
| Class of Worker | GW |
| Hours Worked | 39 |
| Income (1939) | 2160 |
| Highest Grade | Hs 3 |
| 1935 Residence | Same place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Plumbing Inspector |
| Township / Ward | Elizabeth City |
| Est. Birth Year | ~1907 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Lillian Kirk | Spouse | — | 32 | ~1908 |
| Joan Kirk | Daughter | — | 9 | ~1931 |
| Barbara Kirk | Daughter | — | 1 | ~1939 |
| John Kirk | Head | — | 33 | ~1907 |
| Maureen Kirk | Daughter | — | 7 | ~1933 |
| Eugene Kirk | Son | — | 5 | ~1935 |
Census Appearances
1930
Union, New …
Head, age 23
Union, New Jersey · implied b. ~1907 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kirk |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Married |
| Birthplace | New Jersey |
| Age at First Marriage | 22 |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Occupation | Salesman |
| Industry | Food |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 40 |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Union-County, New …
Head, age 33
Union-County, New Jersey · implied b. ~1907 — 6 household members
| Surname | Kirk |
| Given Name | John A. |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | New Jersey |
| 1935 Residence (City) | Elizabeth City |
| 1935 Residence (County) | Union |
| Occupation | plumbing inspector |
| Industry | city engineer |
| Class of Worker | GW |
| Hours Worked | 39 |
| Income (1939) | 2160 |
| Highest Grade | Hs 3 |
| 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 Kirk across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Kirk
Head · 1940 · age 33 · b. ~1907 · 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-t0627-02400-00459)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Violet Lord | 27 | daughter | Stenographer | Scotland |
| 42 | Catherine Feehan | 43 | head | Elementary Teacher | New Jersey |
| 43 | Adelaide Feehan | 37 | sister | — | New Jersey |
| 44 | Margaret Feehan | 28 | sister | Stenographer | New Jersey |
| 45 | George J. Boehm | 79 | head | — | New Jersey |
| 46 | Margaret Boehm | 75 | wife | — | New York |
| 47 | George J. Boehm | 51 | son | Pipe Fitter | New Jersey |
| 48 | Margaret Boehm | 49 | daughter | Stenographer | New Jersey |
| 49 | James J. Coakley | 68 | head | Adjuster | Eire |
| 50 | Mary Coakley | None | wife | — | Eire |
| 51 | James Jr Coakley | 32 | son | Electrical Engineer | New Jersey |
| 52 | Francis X. Coakley | 28 | son | Golf Teacher | New Jersey |
| 53 | May T. Coakley | 26 | daughter | Stenographer | New Jersey |
| 54 | John F. Coakley | 23 | son | Mechanical Engineer | New Jersey |
| 55 | Thomas R. Coakley | 25 | son | Accountant | New Jersey |
| 56 | John A. Kirk THIS PERSON | 33 | head | Plumbing Inspector | New Jersey |
| 57 | Lillian Kirk | 32 | wife | — | New York |
| 58 | Joan Kirk | 9 | daughter | — | New Jersey |
| 59 | Maureen Kirk | 7 | daughter | — | New Jersey |
| 60 | Eugene Kirk | 5 | son | — | New Jersey |
| 61 | Barbara Kirk | 1 | daughter | — | New Jersey |
| 62 | James Mattheson | 41 | head | Oil Burner Mechanic | England |
| 63 | Anna Mattheson | 32 | wife | — | New Jersey |
| 64 | James Mattheson | 11 | son | — | New York |
| 65 | Neil Mattheson | 7 | son | — | New York |
| 66 | William Mattheson | 6 | son | — | New Jersey |
| 67 | Alice Mattheson | 3 | daughter | — | New Jersey |
| 68 | William Dangel | 30 | head | Driver | New Jersey |
| 69 | Renee Dangel | 37 | wife | Feather Paster | New York |
| 70 | Katie Wasnaik | 64 | head | — | Germany |
| 71 | Albert Smithman | 51 | head | Painting | New Jersey |
| 72 | Frederick Schmid | 38 | head | Cook | Switzerland |
| 73 | Theresa Schmid | 65 | wife | — | New Jersey |
| 74 | Alice Ginsler | 58 | sister-in-law boarder | — | New Jersey |
| 75 | Joseph Ginsler | 34 | boarder | Roadman Laborer | New Jersey |
| 76 | Helen Bayle | 59 | boarder | Laundress | New Jersey |
| 77 | Edmund Mansfield | 42 | head | Traffic Inspector | New Jersey |
| 78 | Helen Mansfield | 37 | wife | — | New Jersey |
| 79 | Helen Mansfield | 10 | daughter | — | New Jersey |
| 80 | Annie Breihof | 68 | head | — | Pennsylvania |
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)