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 19-person household.
Age 38
b. ~1892
Female
Spouse
Born: Michigan
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 | Michigan |
| Age at First Marriage | 20 |
| Father's Birthplace | Poland |
| Mother's Birthplace | Poland |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
| Township / Ward | Detroit City |
| 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.
19 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| John Kowalski | Son | — | 18 | ~1912 |
| Mary Kowalski | Other | — | 26 | ~1904 |
| Gertrude Kowalski | Other | — | 20 | ~1910 |
| Albert Kowalski | Head | — | 42 | ~1888 |
| Joseph Kowalski | Other | — | 33 | ~1897 |
| Leo Kowalski | Son | — | 10 | ~1920 |
| Thomas Kowalski | Son | — | 18 | ~1912 |
| Arthur Kowalski | Son | — | 5 | ~1925 |
| Mary Kowalski | Other | — | 68 | ~1862 |
| Angeline Kowalski | Other | — | 24 | ~1906 |
| Stanley Kowalski | Son | — | 14 | ~1916 |
| Frank Kowalski | Other | — | 31 | ~1899 |
| Mary Kowalski | Spouse | — | 38 | ~1892 |
| Helen Kowalski | Daughter | — | 12 | ~1918 |
| Raymond Kowalski | Son | — | 8 | ~1922 |
| Martha Kowalski | Other | — | 22 | ~1908 |
| Edward Kowalski | Son | — | 16 | ~1914 |
| John Kowalski | Other | — | 35 | ~1895 |
| Andrew Kowalski | Other | — | 38 | ~1892 |
Census Appearances
1920
Wayne, Michigan
Spouse, age 27
Wayne, Michigan · implied b. ~1893 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kowalski |
| Given Name | Mary J. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Michigan |
| Father's Birthplace | Poland |
| Mother's Birthplace | Poland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1930
Wayne, Michigan
Spouse, age 38
Wayne, Michigan · implied b. ~1892 — 19 household members
| Surname | Kowalski |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Michigan |
| Age at First Marriage | 20 |
| Father's Birthplace | Poland |
| Mother's Birthplace | Poland |
| Can Read/Write | Yes |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
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 Wayne, Michigan, using XGBoost record linkage.
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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:michigancensus00reel1060:0684)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Frank | 22 | Head | Mechanic | Michigan |
| 52 | Anna | 22 | Wife | — | Michigan |
| 53 | Frank Jr. | 1 | Son | — | Michigan |
| 54 | Ignace Kowalski | 25 | Head | — | New Jersey |
| 55 | Mary Kowalski | 22 | Wife | — | Michigan |
| 56 | Edward Kowalski | 2 | Son | — | Michigan |
| 57 | Irene Kowalski | 1 | Daughter | — | Michigan |
| 58 | Sophie Kowalski | 0 | Daughter | — | Michigan |
| 59 | Albert Kowalski | 42 | Head | Painter | Michigan |
| 60 | Mary Kowalski THIS PERSON | 38 | Wife | — | Michigan |
| 61 | John Kowalski | 18 | Son | — | Michigan |
| 62 | Edward Kowalski | 16 | Son | — | Michigan |
| 63 | Stanley Kowalski | 14 | Son | — | Michigan |
| 64 | Helen Kowalski | 12 | Daughter | — | Michigan |
| 65 | Leo Kowalski | 10 | Son | — | Michigan |
| 66 | Raymond Kowalski | 8 | Son | — | Michigan |
| 67 | Arthur Kowalski | 5 | Son | — | Michigan |
| 68 | Andrew Kowalski | 38 | Brother | Laborer | Michigan |
| 69 | Mary Kowalski | 68 | Mother | — | Poland |
| 70 | John Kowalski | 35 | Brother | Laborer | Michigan |
| 71 | Joseph Kowalski | 33 | Brother | Laborer | Michigan |
| 72 | Frank Kowalski | 31 | Brother | Laborer | Michigan |
| 73 | Mary Kowalski | 26 | Sister | — | Michigan |
| 74 | Angeline Kowalski | 24 | Sister | — | Michigan |
| 75 | Martha Kowalski | 22 | Sister | — | Michigan |
| 76 | Gertrude Kowalski | 20 | Sister | — | Michigan |
| 77 | Thomas Kowalski | 18 | Son | — | Michigan |
| 78 | John Kowalski | 46 | Head | Laborer | Poland |
| 79 | Mary Kowalski | 45 | Wife | Laborer | Poland |
| 80 | John Kowalski | 12 | Son | — | Michigan |
| 81 | Martha Kowalski | 10 | Daughter | — | Michigan |
| 82 | Mary Kowalski | 8 | Daughter | — | Michigan |
| 83 | Joseph Kowalski | 6 | Son | Laborer | Michigan |
| 84 | John Kowalski | 60 | Head | — | Poland |
| 85 | Anna Kowalski | 56 | Wife | Mechanic | Poland |
| 86 | Mary Kowalski | 23 | Daughter | — | Michigan |
| 87 | Martha Kowalski | 21 | Daughter | — | Michigan |
| 88 | Angeline Kowalski | 13 | Daughter | — | Michigan |
| 89 | Peter Kowalski | 50 | Head | Laborer | Poland |
| 90 | Veronica Kowalski | 41 | Wife | — | Poland |
| 91 | Edward Kowalski | 26 | Son | Laborer | Michigan |
| 92 | James Kowalski | 20 | Son | — | Michigan |
| 93 | John Kowalski | 18 | Son | Packer | Michigan |
| 94 | Anna Kowalski | 16 | Daughter | — | Michigan |
| 95 | Mary Kowalski | 14 | Daughter | — | Michigan |
| 96 | Angeline Kowalski | 11 | Daughter | — | Michigan |
| 97 | Martha Kowalski | 9 | Daughter | — | Michigan |
| 98 | Lottie Kowalski | 7 | Daughter | — | Michigan |
| 99 | Helen Kowalski | 5 | Daughter | — | Michigan |
| 100 | Theresa Kowalski | 2 | Daughter | — | Michigan |
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)