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Joseph Kowalski — 1940 US Census Record
Model Tree available1940 United States Federal Census · Milwaukee-County, Wisconsin
Our Model Tree links this Joseph Kowalski across the 1920, 1930 and 1940 US Censuses in Milwaukee-County, Wisconsin (XGBoost, ~Confirmed), with identified parents John & Mary — first a head (b.~1894), then head of a 4-person household.
Age 46
b. ~1894
Male
Head
Born: Wisconsin
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Milwaukee-County, Wisconsin |
| Surname | Kowalski |
| Given Name | Joseph |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Wisconsin |
| 1935 Residence (City) | Town of Greenfield |
| 1935 Residence (County) | Milwaukee |
| Additional Details | |
| Highest Grade | No 2 |
| 1935 Residence | Same place |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
| Township / Ward | Town Of Greenfield |
| Est. Birth Year | ~1894 |
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 Joseph | Age | Birth yr |
|---|---|---|---|---|
| Jerome Kowalski | Son | — | 19 | ~1921 |
| Leroy Kowalski | Son | — | 12 | ~1928 |
| Agnes Kowalski | Spouse | — | 44 | ~1896 |
| Joseph Kowalski | Head | — | 46 | ~1894 |
Census Appearances
1920
Milwaukee, Wisconsin
Son, age 24
Milwaukee, Wisconsin · implied b. ~1896 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kowalski |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| Father's Birthplace | Poland |
| Mother's Birthplace | Poland |
| Occupation | Laborer |
| Industry | Factory |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Polish |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
1930
Milwaukee, Wisconsin
Head, age 35
Milwaukee, Wisconsin · implied b. ~1895 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kowalski |
| Given Name | Joseph |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Wisconsin |
| Age at First Marriage | 25 |
| Father's Birthplace | Poland |
| Mother's Birthplace | Poland |
| Occupation | Helper-quarter master |
| Industry | Steam railroad |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 5000 |
| Radio Set | R |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
1940
Milwaukee-County, Wisconsin
Head, age 46
Milwaukee-County, Wisconsin · implied b. ~1894 — 4 household members
| Surname | Kowalski |
| Given Name | Joseph |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Wisconsin |
| 1935 Residence (City) | Town of Greenfield |
| 1935 Residence (County) | Milwaukee |
| Highest Grade | No 2 |
| 1935 Residence | Same place |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
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 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Kowalski (~0.92 confidence) and mother Mary Kowalski (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Kowalski
b. ~1868
Source father
● Household
· direct · ~0.92
Mother
Mary Kowalski
b. ~1870
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Joseph Kowalski
Head · 1940 · age 46 · b. ~1894 · Wisconsin
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Milwaukee-County, Wisconsin
Open full size
1940 US Federal Census — Milwaukee-County, Wisconsin
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04500-01061)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Angeline Saliger | 38 | Wife | — | Wisconsin |
| 2 | Robert Saliger | 14 | Son | — | Wisconsin |
| 3 | Rosalie Saliger | 12 | Daughter | — | Wisconsin |
| 4 | Germaine Saliger | 9 | Daughter | — | Wisconsin |
| 5 | Claire Saliger | 3 | Daughter | — | Wisconsin |
| 6 | Frank Slainka | 55 | Head | Mail Man | Wisconsin |
| 7 | Martha Slainka | 52 | Wife | — | Wisconsin |
| 8 | Roland Slainka | 19 | Son | New Worker | Wisconsin |
| 9 | Ferdinand Slainka | 17 | Son | — | Wisconsin |
| 10 | Herman Knoll | 86 | Head | — | Germany |
| 11 | William Knoll | 46 | Son | — | Wisconsin |
| 12 | Anna Knoll | 41 | Wife | — | Wisconsin |
| 13 | Mildred Knoll | 20 | Daughter | New Worker | Wisconsin |
| 14 | Kenneth Knoll | 14 | Son | — | Wisconsin |
| 15 | Everett Jr. Ostert | 36 | Head | Truck Driver | Wisconsin |
| 16 | Agnes Ostert | 48 | Wife | — | Wisconsin |
| 17 | Dolores Ostert | 5 | Daughter | — | Wisconsin |
| 18 | Dennis Ostert | 4 | Son | — | Wisconsin |
| 19 | Andrew Wenzel | 56 | Head | Foreman | Germany |
| 20 | Ann Wenzel | 52 | Wife | — | Wisconsin |
| 21 | Mildred Wenzel | 24 | Daughter | Office Worker | Wisconsin |
| 22 | Bruno Maciejewski | 32 | Head | Core Dept | Wisconsin |
| 23 | Rose Maciejewski | 29 | Wife | — | Wisconsin |
| 24 | Rose Marie Maciejewski | 8 | Daughter | — | Wisconsin |
| 25 | Doris Maciejewski | 2 | Daughter | — | Wisconsin |
| 26 | Frank Danielski | 73 | Head | — | Poland |
| 27 | William Danielski | 36 | Son | Electrician | Wisconsin |
| 28 | Frank Danielski | 33 | Son | — | Wisconsin |
| 29 | Anthony Danielski | 38 | Head | Electrician | Wisconsin |
| 30 | Sophia Danielski | 34 | Wife | — | Wisconsin |
| 31 | Walter Kiss | 43 | Head | Metal Man | Poland |
| 32 | Nadine Kiss | 39 | Wife | — | Illinois |
| 33 | Marcheta Kiss | 14 | Step daughter | — | Wisconsin |
| 34 | Thine, Quinton Kiss | 12 | Son | — | Wisconsin |
| 35 | Mary Fink | 64 | Head | — | Poland |
| 36 | John Fink | 33 | Son | Metal Man | Wisconsin |
| 37 | Joseph Kowalski THIS PERSON | 46 | Head | — | Wisconsin |
| 38 | Agnes Kowalski | 44 | Wife | — | Wisconsin |
| 39 | Jerome Kowalski | 19 | Son | — | Wisconsin |
| 40 | Leroy Kowalski | 12 | Son | — | Wisconsin |
Pedigree Summary
Joseph
Gen 1 · 2 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)