MK
Mary Kowalski — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Wayne, Michigan
Our Model Tree links this Mary Kowalski across the 1920 and 1930 US Censuses in Wayne, Michigan (XGBoost, ~Confirmed) — first a spouse (b.~1892), then head of a 12-person household.
Age 38
b. ~1892
Female
Spouse
Born: Austria
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Wayne, Michigan |
| Surname | Kowalski |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Austria |
| Naturalization Status | Alien |
| Year of Immigration | 1912 |
| Age at First Marriage | 20 |
| Father's Birthplace | Austria |
| Mother's Birthplace | Austria |
| Additional Details | |
| Can Read/Write | Yes |
| Mother Tongue | Polish |
| Birth Country | Austria |
| Birthplace (normalized) | austria |
| Township / Ward | City Of Detroit |
| Est. Birth Year | ~1892 |
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.
12 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Leo Kowalski | Son | — | 9 | ~1921 |
| Joseph Kowalski | Son | — | 11 | ~1919 |
| Chester Kowalski | Son | — | 2 | ~1928 |
| Casimir Kowalski | Son | — | 13 | ~1917 |
| Mary Kowalski | Spouse | — | 38 | ~1892 |
| Helen Kowalski | Daughter | — | 5 | ~1925 |
| Edward Kowalski | Son | — | 7 | ~1923 |
| Joseph Kowalski | Head | — | 42 | ~1888 |
| John Kowalski | Son | — | 15 | ~1915 |
| Irene Kowalski | Daughter | — | 3 | ~1927 |
| Raymond Kowalski | Son | — | ~1930 | |
| Walter Kowalski | Son | — | 17 | ~1913 |
Census Appearances
1920
Monroe, Michigan
Spouse, age 28
Monroe, Michigan · implied b. ~1892 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kowalski |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Austria |
| Year of Immigration | 1912 |
| Naturalization Status | Alien |
| Father's Birthplace | Austria |
| Mother's Birthplace | Austria |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Polish |
| Birth Country | Austria |
| Birthplace (normalized) | austria |
1930
Wayne, Michigan
Spouse, age 38
Wayne, Michigan · implied b. ~1892 — 12 household members
| Surname | Kowalski |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Austria |
| Naturalization Status | Alien |
| Year of Immigration | 1912 |
| Age at First Marriage | 20 |
| Father's Birthplace | Austria |
| Mother's Birthplace | Austria |
| Can Read/Write | Yes |
| Mother Tongue | Polish |
| Birth Country | Austria |
| Birthplace (normalized) | austria |
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 Kowalski across 2 US Census years (1920 and 1930) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Kowalski
Spouse · 1930 · age 38 · b. ~1892 · Michigan
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Wayne, Michigan
Open full size
1930 US Federal Census — Wayne, Michigan
Page Contents
50 people indexed on this census page (ia:1930:michigancensus00reel1048:0446)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John Zimmerman | 42 | Head | Laborer | Poland |
| 2 | Agnes Zimmerman | 37 | Wife | — | Poland |
| 3 | John Zimmerman | 16 | Son | — | Poland |
| 4 | Stanley Zimmerman | 14 | Son | — | Poland |
| 5 | Edward Zimmerman | 11 | Son | — | Michigan |
| 6 | Leo Zimmerman | 9 | Son | — | Michigan |
| 7 | Chester Zimmerman | 7 | Son | — | Michigan |
| 8 | Helen Zimmerman | 5 | Daughter | — | Michigan |
| 9 | Irene Zimmerman | 5 | Daughter | — | Michigan |
| 10 | Joseph Kowalski | 42 | Head | Laborer | Austria |
| 11 | Mary Kowalski THIS PERSON | 38 | Wife | — | Austria |
| 12 | Walter Kowalski | 17 | Son | Laborer | Austria |
| 13 | John Kowalski | 15 | Son | — | Austria |
| 14 | Casimir Kowalski | 13 | Son | — | Poland |
| 15 | Joseph Kowalski | 11 | Son | — | Poland |
| 16 | Leo Kowalski | 9 | Son | — | Michigan |
| 17 | Edward Kowalski | 7 | Son | — | Michigan |
| 18 | Helen Kowalski | 5 | Daughter | — | Michigan |
| 19 | Irene Kowalski | 3 | Daughter | — | Michigan |
| 20 | Chester Kowalski | 2 | Son | — | Michigan |
| 21 | Raymond Kowalski | 0 | Son | — | Michigan |
| 22 | John Mclean | 42 | Head | — | Scotland |
| 23 | John Mclean | 21 | Son | Laborer | Scotland |
| 24 | William Mclean | 18 | Son | Laborer | Scotland |
| 25 | Margaret Mclean | 16 | Daughter | — | Scotland |
| 26 | James Mclean | 14 | Son | — | Scotland |
| 27 | John Kowalski | 41 | Head | Laborer | Poland |
| 28 | Mary Kowalski | 38 | Wife | — | Poland |
| 29 | John Kowalski | 16 | Son | — | Michigan |
| 30 | Stanley Kowalski | 13 | Son | — | Michigan |
| 31 | Edward Kowalski | 11 | Son | — | Michigan |
| 32 | Leo Kowalski | 9 | Son | — | Michigan |
| 33 | Helen Kowalski | 6 | Daughter | — | Michigan |
| 34 | Irene Kowalski | 4 | Daughter | — | Michigan |
| 35 | — | None | — | — | — |
| 36 | — | None | — | — | — |
| 37 | — | None | — | — | — |
| 38 | — | None | — | — | — |
| 39 | — | None | — | — | — |
| 40 | — | None | — | — | — |
| 41 | — | None | — | — | — |
| 42 | — | None | — | — | — |
| 43 | — | None | — | — | — |
| 44 | — | None | — | — | — |
| 45 | — | None | — | — | — |
| 46 | — | None | — | — | — |
| 47 | — | None | — | — | — |
| 48 | — | None | — | — | — |
| 49 | — | None | — | — | — |
| 50 | — | None | — | — | — |
Related Census Records
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)