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Joseph Kowalski — 1940 US Census Record
Model Tree available1940 United States Federal Census · Dubuque-County, Iowa
Our Model Tree links this Joseph Kowalski across the 1920, 1930 and 1940 US Censuses in Dubuque-County, Iowa (XGBoost, ~Confirmed), with identified parents Anton & Elizabeth — first a son (b.~1908), then head of a 4-person household.
Age 32
b. ~1908
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Dubuque-County, Iowa |
| Surname | Kowalski |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Dubuque |
| 1935 Residence (County) | Dubuque |
| Additional Details | |
| Occupation | Machine Hand |
| Industry | Sash & Door Mill |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 496 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Machine Hand |
| Township / Ward | Dubuque |
| 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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Joseph | Age | Birth yr |
|---|---|---|---|---|
| August Bramer | Other | — | 57 | ~1883 |
| Anton Kowalski | Head | — | 60 | ~1880 |
| Elizabeth Kowalski | Spouse | — | 52 | ~1888 |
| Joseph Kowalski | Son | — | 32 | ~1908 |
Census Appearances
1920
Dubuque, Iowa
Son, age 11
Dubuque, Iowa · implied b. ~1909 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kowalski |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | German |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Dubuque, Iowa
Son, age 22
Dubuque, Iowa · implied b. ~1908 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kowalski |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Occupation | Laborer |
| Industry | Sash & Door Mfg |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Dubuque-County, Iowa
Son, age 32
Dubuque-County, Iowa · implied b. ~1908 — 4 household members
| Surname | Kowalski |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Dubuque |
| 1935 Residence (County) | Dubuque |
| Occupation | Machine Hand |
| Industry | Sash & Door Mill |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 496 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
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 Anton Kowalski (~0.92 confidence) and mother Elizabeth Kowalski (~0.92 confidence) and mother Marie Kowalski (~0.92 confidence) and mother Marie Kowalski (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Anton Kowalski
b. ~1881
Source father
● Household
· direct · ~0.92
Mother
Elizabeth Kowalski
b. ~1888
Source mother
● Household
· direct · ~0.92
Mother
Marie Kowalski
b. ~1886
Source mother
● Household
· direct · ~0.92
Mother
Marie Kowalski
b. ~1891
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Joseph Kowalski
Son · 1940 · age 32 · b. ~1908 · Iowa
★ 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 — Dubuque-County, Iowa
Open full size
1940 US Federal Census — Dubuque-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01158-00822)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Roger Mc Laughlin | 7 | Son | — | Iowa |
| 2 | Wayne Mc Laughlin | 1 | Son | — | Iowa |
| 3 | Edward Hentsch | 27 | Head | Laborer | Illinois |
| 4 | Margaret Hentsch | 22 | Wife | — | Iowa |
| 5 | Edward Jr Hentsch | 3 | Son | — | Iowa |
| 6 | William Bauer | 37 | Head | Laborer | Iowa |
| 7 | Mary Bauer | 36 | Wife | — | Iowa |
| 8 | Joseph O'Mara | 33 | Head | Trucker | Iowa |
| 9 | Helen O'Mara | 32 | Wife | — | Iowa |
| 10 | Joseph Jr O'Mara | 5 | Son | — | Iowa |
| 11 | Anton Kowalski | 60 | Head | Cabinet Maker | Germany |
| 12 | Elizabeth Kowalski | 52 | Wife | — | Iowa |
| 13 | Joseph Kowalski THIS PERSON | 32 | Son | Machine Hand | Iowa |
| 14 | August Bramer | 57 | Step-son | Car Repairer | Germany |
| 15 | Otto Merz | 57 | Head | Iron Molder | Iowa |
| 16 | Katherine Merz | 49 | Wife | — | Illinois |
| 17 | Edward G Block | 44 | Head | Butcher | Iowa |
| 18 | Frank Chalder | 44 | Head | Helper | Iowa |
| 19 | Ethel Chalder | 34 | Wife | — | Iowa |
| 20 | Rita May Chalder | 11 | Daughter | — | Iowa |
| 21 | Betty Lou Chalder | 9 | Daughter | — | Iowa |
| 22 | James Chalder | 6 | Son | — | Iowa |
| 23 | Robert Chalder | 3 | Son | — | Iowa |
| 24 | Joan Chalder | 0 | Daughter | — | Iowa |
| 25 | Arthur Schoenberger | 23 | Head | Truck Driver | Iowa |
| 26 | Rose Schoenberger | 26 | Wife | — | Iowa |
| 27 | Philip Mihalakos | 44 | Head | Proprietor | Greece |
| 28 | Nola Mihalakos | 44 | Wife | — | Iowa |
| 29 | Delores Mihalakos | 23 | Daughter | Waitress | Iowa |
| 30 | Leonidas Mihalakos | 18 | Son | Laborer | Iowa |
| 31 | Irene Mihalakos | 17 | Daughter | Clerk | Iowa |
| 32 | Kathleen Mihalakos | 16 | Daughter | — | Iowa |
| 33 | George Mihalakos | 12 | Son | — | Iowa |
| 34 | John Mihalakos | 10 | Son | — | Iowa |
| 35 | Clarence Key | 60 | Head | Helper | Iowa |
| 36 | Helen Key | 31 | Wife | — | Iowa |
| 37 | Lenore Key | 15 | Daughter | — | Iowa |
| 38 | Leo Booth | 30 | Brother-in-law | Truck Driver | Iowa |
| 39 | Frank Schaffert | 66 | Head | — | Germany |
| 40 | Joseph Schaffert | 19 | Son | 35 | Iowa |
Pedigree Summary
Joseph
Gen 1 · 4 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)