MK
Mary Kowalski — 1910 US Census Record
Linked across censuses1910 United States Federal Census · Cook, Illinois
Our Model Tree links this Mary Kowalski across the 1900 and 1910 US Censuses in Cook, Illinois (XGBoost, ~Confirmed) — first a spouse (b.~1869), then head of a 14-person household.
Age 41
b. ~1869
Female
Spouse
Born: Poland
Married
1910 Census Record Details
| Census Year | 1910 |
| Location | Cook, Illinois |
| Surname | Kowalski |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Poland |
| Years Married | 17 |
| Children Born | 8 |
| Children Living | 6 |
| Year of Immigration | 1888 |
| Father's Birthplace | Poland |
| Mother's Birthplace | Poland |
| Additional Details | |
| Birth Country | Poland |
| Birthplace (normalized) | poland |
| Township / Ward | Chicago City Part Of |
| Est. Birth Year | ~1869 |
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.
14 people recorded at the same address in the 1910 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Andrew Kowalski | Son | — | 16 | ~1894 |
| Josephine Kowalski | Daughter | — | 10 | ~1900 |
| Sebastian Kowalski | Other | — | 25 | ~1885 |
| Frank Kowalski | Other | — | 23 | ~1887 |
| Walter Kowalski | Son | — | 8 | ~1902 |
| Mary Kowalski | Spouse | — | 41 | ~1869 |
| Helen Kowalski | Daughter | — | 14 | ~1896 |
| John Kowalski | Other | — | 21 | ~1889 |
| Stanislaus Kowalski | Head | — | 43 | ~1867 |
| Victoria Kowalski | Daughter | — | 11 | ~1899 |
| Anna Kowalski | Other | — | 23 | ~1887 |
| Joe Kowalski | Other | — | 22 | ~1888 |
| Joseph Kowalski | Other | — | 24 | ~1886 |
| Alexander Kowalski | Other | — | 24 | ~1886 |
Census Appearances
1900
Cook, Illinois
Spouse, age 29
Cook, Illinois · implied b. ~1871 — 6 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 | Poland |
| Birth Month | Oct |
| Birth Year | 1871 |
| Year of Immigration | 1885 |
| Father's Birthplace | Poland |
| Mother's Birthplace | Poland |
| Occupation | |Yes |
| Can Read | Yes |
| Can Write | Yes |
| Birth Country | Poland |
| Birthplace (normalized) | poland |
1910
Cook, Illinois
Spouse, age 41
Cook, Illinois · implied b. ~1869 — 14 household members
| Surname | Kowalski |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Poland |
| Years Married | 17 |
| Children Born | 8 |
| Children Living | 6 |
| Year of Immigration | 1888 |
| Father's Birthplace | Poland |
| Mother's Birthplace | Poland |
| Birth Country | Poland |
| Birthplace (normalized) | poland |
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 (1900 and 1910) in Cook, Illinois, using XGBoost record linkage.
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This person
Anchor record
Mary Kowalski
Spouse · 1910 · age 41 · b. ~1869 · Illinois
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1910 US Federal Census — Cook, Illinois
Open full size
1910 US Federal Census — Cook, Illinois
Page Contents
50 people indexed on this census page (ia:1910:13thcensus1910po254unit:0432)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Stanislaus Kowalski | 43 | Head | Laborer | Illinois |
| 52 | Mary Kowalski THIS PERSON | 41 | Wife | — | Poland |
| 53 | Andrew Kowalski | 16 | Son | Laborer | Illinois |
| 54 | Helen Kowalski | 14 | Daughter | — | Illinois |
| 55 | Victoria Kowalski | 11 | Daughter | — | Illinois |
| 56 | Josephine Kowalski | 10 | Daughter | — | Illinois |
| 57 | Walter Kowalski | 8 | Son | — | Illinois |
| 58 | Alexander Kowalski | 24 | Boarder | Laborer | Poland |
| 59 | Joseph Kowalski | 24 | Boarder | Laborer | Poland |
| 60 | Joe Kowalski | 22 | Boarder | Laborer | Poland |
| 61 | Frank Kowalski | 23 | Boarder | Laborer | Poland |
| 62 | John Kowalski | 21 | Boarder | Laborer | Poland |
| 63 | Sebastian Kowalski | 25 | Boarder | Laborer | Poland |
| 64 | Anna Kowalski | 23 | Boarder | — | Poland |
| 65 | Andrew Zelinski | 34 | Head | Laborer | Poland |
| 66 | Anna Zelinski | 27 | Wife | — | Poland |
| 67 | Albert Zelinski | 10 | Son | — | Illinois |
| 68 | Frank Zelinski | 8 | Son | — | Illinois |
| 69 | Mike Zelinski | 5 | Son | — | Illinois |
| 70 | Karl Zelinski | 3 | Son | — | Illinois |
| 71 | Andrew Sarganis | 36 | Head | Iron Molder | Poland |
| 72 | Katie Sarganis | 25 | Wife | — | Poland |
| 73 | Lottie Sarganis | 7 | Daughter | — | Illinois |
| 74 | Joe Sarganis | 5 | Son | — | Illinois |
| 75 | Victoria Sarganis | 3 | Daughter | — | Illinois |
| 76 | John Sarganis | 24 | Boarder | Laborer | Poland |
| 77 | Stanislaus Sarganis | 27 | Boarder | Laborer | Poland |
| 78 | Mary Sarganis | 22 | Boarder | Machinist | Poland |
| 79 | Stanislaus Kucharek | 33 | Head | Laborer | Poland |
| 80 | Agnes Kucharek | 28 | Wife | — | Poland |
| 81 | Josephine Kucharek | 9 | Daughter | — | Illinois |
| 82 | Helen Kucharek | 7 | Daughter | — | Illinois |
| 83 | Valentine Kucharek | 4 | Son | — | Illinois |
| 84 | Marianne Kucharek | 0 | Daughter | — | Illinois |
| 85 | Stanislaus Kucharek | 24 | Boarder | Laborer | Poland |
| 86 | Julia Kucharek | 22 | Daughter | Shop Girl | Poland |
| 87 | Mary Kucharek | 20 | Boarder | — | Poland |
| 88 | Karl Kucharek | 21 | Boarder | — | Poland |
| 89 | Ludwig Kucharek | 23 | Boarder | — | Poland |
| 90 | Victoria Kucharek | 18 | Daughter | — | Poland |
| 91 | John Kucharek | 27 | Boarder | Laborer | Poland |
| 92 | Mary Kucharek | 24 | Boarder | — | Poland |
| 93 | John Kucharek | 30 | Boarder | Laborer | Poland |
| 94 | Joe Kaczmarek | 35 | Head | Laborer | Poland |
| 95 | Mary Kaczmarek | 32 | Wife | — | Poland |
| 96 | Joe Kaczmarek | 6 | Son | — | Illinois |
| 97 | Maria Kaczmarek | 4 | Daughter | — | Illinois |
| 98 | Jacob Kaczmarek | 40 | Boarder | — | Poland |
| 99 | Joe Kozlowski | 30 | Head | Laborer | Poland |
| 100 | Mary Kozlowski | 25 | Wife | — | Poland |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1910 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)