MK
Mary Kowalski — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Presque-Isle-County, Michigan
Our Model Tree links this Mary Kowalski across the 1930 and 1940 US Censuses in Presque-Isle-County, Michigan (XGBoost, ~Confirmed) — first a daughter (b.~1917), then head of a 7-person household.
Age 23
b. ~1917
Female
Daughter
Born: Michigan
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Presque-Isle-County, Michigan |
| Surname | Kowalski |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Belknap |
| 1935 Residence (County) | Presque Isle |
| Additional Details | |
| Occupation | Binder |
| Industry | Garment Factory |
| Class of Worker | PW |
| Hours Worked | 32 |
| Income (1939) | 300 |
| Highest Grade | S 8 |
| 1935 Residence | Michigan |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
| Occupation | Binder |
| Township / Ward | Rogers City Village |
| Est. Birth Year | ~1917 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Eugenia Kowalski | Daughter | — | 12 | ~1928 |
| Mary Kowalski | Daughter | — | 23 | ~1917 |
| Anthony Kowalski | Son | — | 20 | ~1920 |
| Elizabeth Kowalski | Spouse | — | 50 | ~1890 |
| Anthony Kowalski | Head | — | 54 | ~1886 |
| Audrey Kowalski | Daughter | — | 3 | ~1937 |
| Marjorie Kowalski | Daughter | — | 15 | ~1925 |
Census Appearances
1930
Presque Isle, …
Daughter, age 12
Presque Isle, Michigan · implied b. ~1918 — 17 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kowalski |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Michigan |
| Father's Birthplace | Michigan |
| Mother's Birthplace | Michigan |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1940
Presque-Isle-County, Michigan
Daughter, age 23
Presque-Isle-County, Michigan · implied b. ~1917 — 7 household members
| Surname | Kowalski |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Belknap |
| 1935 Residence (County) | Presque Isle |
| Occupation | Binder |
| Industry | Garment Factory |
| Class of Worker | PW |
| Hours Worked | 32 |
| Income (1939) | 300 |
| Highest Grade | S 8 |
| 1935 Residence | Michigan |
| 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 (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Kowalski
Daughter · 1940 · age 23 · b. ~1917 · Michigan
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Sibling
Eugenia Kowalski
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Audrey Kowalski
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marjorie Kowalski
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anthony Kowalski
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Presque-Isle-County, Michigan
Open full size
1940 US Federal Census — Presque-Isle-County, Michigan
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01810-00275)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Daniel E. Pouch | 13 | Son | — | Michigan |
| 42 | Eleanor R. Pouch | 8 | Daughter | — | Michigan |
| 43 | Benedict Lewandowski | 26 | Son-in-law | Laborer | Michigan |
| 44 | Martha H. Lewandowski | 22 | Daughter | Plain Sewer | Michigan |
| 45 | Ronald R. Lewandowski | 0 | Grandson | — | Michigan |
| 46 | Stanley S. Szczepaniak | 34 | Head | Pitman | Michigan |
| 47 | Anna B. Szczepaniak | 30 | Wife | — | Michigan |
| 48 | John A. Szczepaniak | 10 | Son | — | Michigan |
| 49 | Dolores M. Szczepaniak | 8 | Daughter | — | Michigan |
| 50 | August Dabring | 53 | Head | Drill Helper | Michigan |
| 51 | Anna Dabring | 47 | Wife | — | Michigan |
| 52 | Amelia L. Dabring | 20 | Daughter | Housemaid | Michigan |
| 53 | Alma M. Dabring | 17 | Daughter | — | Michigan |
| 54 | Emma J. Dabring | 14 | Daughter | — | Michigan |
| 55 | Theresa C. Dabring | 11 | Daughter | — | Michigan |
| 56 | Louis Dabring | 8 | Son | — | Michigan |
| 57 | Anthony J. Kowalski | 54 | Head | Trackman | Michigan |
| 58 | Elizabeth Kowalski | 50 | Wife | — | Michigan |
| 59 | Mary Kowalski THIS PERSON | 23 | Daughter | Binder | Michigan |
| 60 | Eugenia T. Kowalski | 12 | Daughter | — | Michigan |
| 61 | Anthony E. Kowalski | 20 | Son | Coal Passer | Michigan |
| 62 | Marjorie A. Kowalski | 15 | Daughter | — | Michigan |
| 63 | Audrey J. Kowalski | 3 | Daughter | — | Michigan |
| 64 | Roman Idalski | 59 | Head | Pan Dumper | Michigan |
| 65 | Katherine Idalski | 58 | Wife | — | Germany |
| 66 | Theresa Idalski | 19 | Daughter | — | Michigan |
| 67 | Agnes Idalski | 18 | Daughter | Housemaid | Michigan |
| 68 | Cecelia Idalski | 15 | Daughter | — | Michigan |
| 69 | Clarence Idalski | 14 | Son | — | Michigan |
| 70 | Lillian Idalski | 11 | Daughter | — | Michigan |
| 71 | Eleanor J. Idalski | 21 | Head | — | Michigan |
| 72 | Michael J. Idalski | 0 | Son | — | Michigan |
| 73 | Joseph Urban | 49 | Head | Laborer | Michigan |
| 74 | Bertha Urban | 42 | Wife | — | Michigan |
| 75 | Bronislaus Urban | 24 | Son | Laborer | Michigan |
| 76 | Thomas R. Urban | 18 | Son | — | Michigan |
| 77 | Melvin A. Lozon | 26 | Head | Laborer | Michigan |
| 78 | Grace M. Lozon | 24 | Wife | — | Michigan |
| 79 | Larry R. Lozon | 1 | Son | — | Michigan |
| 80 | Leo R. Teratuta | 44 | Head | Carpenter | Michigan |
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)