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Joseph Kowalski — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Kings-County, New York
Our Model Tree links this Joseph Kowalski across the 1930 and 1940 US Censuses in Kings-County, New York (XGBoost, ~Confirmed) — first a head (b.~1885), then head of a 9-person household.
Age 55
b. ~1885
Male
Head
Born: Poland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Kings-County, New York |
| Surname | Kowalski |
| Given Name | Joseph |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Poland |
| 1935 Residence (City) | Brooklyn borough |
| 1935 Residence (County) | Kings |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Laborer |
| Industry | Halton Housewrecking |
| Class of Worker | PW |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth Country | Poland |
| Birthplace (normalized) | poland |
| Occupation | Laborer |
| Township / Ward | Brooklyn Borough |
| Est. Birth Year | ~1885 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Joseph | Age | Birth yr |
|---|---|---|---|---|
| Mary Kowalski | Daughter | — | 20 | ~1920 |
| Kenneth Kowalski | Son | — | 5 | ~1935 |
| Josephine Kowalski | Daughter | — | 21 | ~1919 |
| Frank Kowalski | Son | — | 10 | ~1930 |
| Joseph Kowalski | Head | — | 55 | ~1885 |
| Frances Kowalski | Spouse | — | 44 | ~1896 |
| Joseph Kowalski | Son | — | 12 | ~1928 |
| William Juglinchie | Other | — | 55 | ~1885 |
| Caroline Kowalski | Daughter | — | 18 | ~1922 |
Census Appearances
1930
Kings, New …
Head, age 44
Kings, New York · implied b. ~1886 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kowalski |
| Given Name | Joseph |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 44 |
| Marital Status | Married |
| Birthplace | Poland |
| Naturalization Status | Alien |
| Year of Immigration | 1905 |
| Age at First Marriage | 21 |
| Father's Birthplace | Poland |
| Mother's Birthplace | Poland |
| Occupation | Carpenter |
| Industry | Construction |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | Polish |
| Home Owned/Rented | R |
| Home Value / Rent | 15 |
| Veteran | No |
| Birth Country | Poland |
| Birthplace (normalized) | poland |
1940
Kings-County, New …
Head, age 55
Kings-County, New York · implied b. ~1885 — 9 household members
| Surname | Kowalski |
| Given Name | Joseph |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Poland |
| 1935 Residence (City) | Brooklyn borough |
| 1935 Residence (County) | Kings |
| Naturalization Status | Naturalized |
| Occupation | Laborer |
| Industry | Halton Housewrecking |
| Class of Worker | PW |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth Country | Poland |
| Birthplace (normalized) | poland |
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 Joseph Kowalski across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Joseph Kowalski
Head · 1940 · age 55 · b. ~1885 · New York
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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 — Kings-County, New York
Open full size
1940 US Federal Census — Kings-County, New York
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02576-00947)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Thomas White | 74 | Uncle | Retired U.S. Custom Guard | New York |
| 2 | John Lynch | 66 | Head | — | New York |
| 3 | Mary Lynch | 64 | Sister | Housekeeper | New York |
| 4 | Josephine Dillon | 52 | Head | Housekeeper | New York |
| 5 | William Bragg | 55 | Lodger | Longshoreman | New York |
| 6 | Leo Leo | 55 | Head | Checker | New York |
| 7 | Mary Leo | 55 | Wife | Housewife | New York |
| 8 | Marion Leo | 21 | Daughter | Housekeeper | New York |
| 9 | Jane Leo | 21 | Daughter | Nurse | New York |
| 10 | Mary Leo | 19 | Daughter | Glove Operator | New York |
| 11 | Leo Leo | 18 | Son | — | New York |
| 12 | Thomas Leo | 17 | Son | — | New York |
| 13 | Harry Mell | 47 | Head | Painter | New York |
| 14 | Agnes Mell | 40 | Wife | Housewife | New York |
| 15 | Harry Mell | 22 | Son | Laborer | New York |
| 16 | Charles Michel | 53 | Head | Porter | New York |
| 17 | Annie Michel | 47 | Wife | Housewife | South Carolina |
| 18 | John Dolan | 36 | Head | Laborer | New Jersey |
| 19 | Catherine Dolan | 62 | Mother | Housewife | Ireland |
| 20 | Joseph Kowalski THIS PERSON | 55 | Head | Laborer | Poland |
| 21 | Frances Kowalski | 44 | Wife | Housewife | Poland |
| 22 | Josephine Kowalski | 21 | Daughter | Operator | New York |
| 23 | Mary Kowalski | 20 | Daughter | Saleslady | New York |
| 24 | Caroline Kowalski | 18 | Daughter | Office Clerk | New York |
| 25 | Joseph Kowalski | 12 | Son | — | New York |
| 26 | Frank Kowalski | 10 | Son | — | New York |
| 27 | Kenneth Kowalski | 5 | Son | — | New York |
| 28 | William Juglinchie | 55 | Lodger | Weigher | Poland |
| 29 | Margaret Murphy | 68 | Head | Housewife | New York |
| 30 | Mary Murphy | 30 | Niece | Head Baker | Ireland |
| 31 | John Scully | 66 | Brother-in-law | Section Manager | New York |
| 32 | Anna Pearson | 40 | Lodger | Nurse | Sweden |
| 33 | Carl Anderson | 43 | Head | Foreman | Sweden |
| 34 | Signe Anderson | 35 | Wife | Housewife | Sweden |
| 35 | Ida Wiener | 63 | Head | Housewife | Russia |
| 36 | Erwin Wiener | 27 | Son | Clerk | New York |
| 37 | Margaret Murray | 45 | Head | Housewife | Scotland |
| 38 | O'Brian Bishop | 54 | Lodger | Salesman | Canada |
| 39 | Thomas Mcdonald | 46 | Lodger | Laborer | New York |
| 40 | Thomas Daniels | 38 | Lodger | Laborer | New York |
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)