MK
Mary Kozlowski — 1940 US Census Record
Model Tree available1940 United States Federal Census · Wayne-County, Michigan
Our Model Tree links this Mary Kozlowski across the 1920, 1930 and 1940 US Censuses in Wayne-County, Michigan (XGBoost, ~Confirmed), with identified parents Stanley & Mary — first a spouse (b.~1914), then head of a 6-person household.
Age 26
b. ~1914
Female
Spouse
Born: Michigan
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Wayne-County, Michigan |
| Surname | Kozlowski |
| Given Name | Mary C |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 26 |
| Marital Status | Married |
| Birthplace | Michigan |
| 1935 Residence (City) | Detroit City |
| 1935 Residence (County) | Wayne |
| Additional Details | |
| Occupation | 0 |
| Industry | 0 |
| Class of Worker | 0 |
| Income (1939) | 0 |
| Highest Grade | H-1 |
| 1935 Residence | Same Place |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
| Occupation | 0 |
| Township / Ward | Detroit City |
| Est. Birth Year | ~1914 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Rosemarie Kozlowski | Daughter | — | 1 | ~1939 |
| Raymond Kozlowski | Head | — | 27 | ~1913 |
| Geraldine Kozlowski | Daughter | — | 3 | ~1937 |
| Raymond Kozlowski | Son | — | 6 | ~1934 |
| Mary Kozlowski | Spouse | — | 26 | ~1914 |
| Babette Kozlowski | Daughter | — | 1 | ~1939 |
Census Appearances
1920
Wayne, Michigan
Daughter, age 6
Wayne, Michigan · implied b. ~1914 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kozlowski |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Michigan |
| Father's Birthplace | Poland |
| Mother's Birthplace | Poland |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1930
Wayne, Michigan
Daughter, age 16
Wayne, Michigan · implied b. ~1914 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kozlowska |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Michigan |
| Father's Birthplace | Poland |
| Mother's Birthplace | Poland |
| Can Read/Write | Yes |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1940
Wayne-County, Michigan
Spouse, age 26
Wayne-County, Michigan · implied b. ~1914 — 6 household members
| Surname | Kozlowski |
| Given Name | Mary C |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 26 |
| Marital Status | Married |
| Birthplace | Michigan |
| 1935 Residence (City) | Detroit City |
| 1935 Residence (County) | Wayne |
| Occupation | 0 |
| Industry | 0 |
| Class of Worker | 0 |
| Income (1939) | 0 |
| Highest Grade | H-1 |
| 1935 Residence | Same Place |
| 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 Kozlowski across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Stanley Kozlowska (~0.92 confidence) and mother Mary Kozlowska (~0.92 confidence) and mother Mary Kozlowski (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Stanley Kozlowska
b. ~1890
Source father
● Household
· direct · ~0.92
Mother
Mary Kozlowska
b. ~1884
Source mother
● Household
· direct · ~0.92
Mother
Mary Kozlowski
b. ~1866
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Kozlowski
Spouse · 1940 · age 26 · b. ~1914 · Michigan
★ 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 — Wayne-County, Michigan
Open full size
1940 US Federal Census — Wayne-County, Michigan
Page Contents
38 people indexed on this census page (nara:1940:m-t0627-01862-00805)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Louis Henderson | 37 | Wife | 0 | Michigan |
| 42 | John Jr Henderson | 4 | Son | — | Michigan |
| 43 | Mary Henderson | 3 | Daughter | — | Michigan |
| 44 | Theodore Kadowski | 28 | Head | Machinist | New Jersey |
| 45 | Josephine Kadowski | 28 | Wife | 0 | Pennsylvania |
| 46 | Marie Kadowski | 10 | Daughter | — | Michigan |
| 47 | Ronald Kadowski | 1 | Son | — | Michigan |
| 48 | John Tayk | 49 | Head | Laborer | Russia |
| 49 | Helen M Tayk | 14 | Wife | 0 | Poland |
| 50 | Stephen Harkis | 27 | Step Son | Laborer | Ohio |
| 51 | Edward Harkis | 25 | Step Son | Laborer | Pennsylvania |
| 52 | Leonard Hall | 41 | Head | Telegraph Operator | New York |
| 53 | Ethel Hall | 41 | Wife | 0 | New York |
| 54 | Marion Hall | 15 | Daughter | — | New York |
| 55 | Constance Hall | 12 | Daughter | — | Michigan |
| 57 | Carl A Scherman | 46 | Head | Automobile Body Repairman | Michigan |
| 58 | Anna L Scherman | 37 | Wife | 0 | Michigan |
| 59 | Ernest A Scherman | 18 | Son | 0 | Michigan |
| 60 | Phyllis G Scherman | 16 | Daughter | 0 | Michigan |
| 61 | Jean L Scherman | 13 | Daughter | — | Michigan |
| 62 | Nora L Scherman | 10 | Daughter | — | Michigan |
| 63 | Raymond J Kozlowski | 27 | Head | Spot Welder | Michigan |
| 64 | Mary C Kozlowski THIS PERSON | 26 | Wife | 0 | Michigan |
| 65 | Raymond J Jr Kozlowski | 6 | Son | — | Michigan |
| 66 | Geraldine Kozlowski | 3 | Daughter | — | Michigan |
| 67 | Babette Kozlowski | 1 | Daughter | — | Michigan |
| 68 | Rosemarie Kozlowski | 1 | Daughter | — | Michigan |
| 70 | Mike Bielak | 58 | Head | Laborer | Poland |
| 71 | Joseph Bielak | 24 | Son | Laborer | Michigan |
| 72 | Edmund Bielak | 13 | Son | — | Michigan |
| 73 | Dewey M Lentenwith | 38 | Head | Laborer | Michigan |
| 74 | Jean Q Lentenwith | 25 | Wife | 0 | Canada-English |
| 75 | Shirley J Lentenwith | 3 | Daughter | — | Michigan |
| 76 | James Bender | 24 | Lodger | Laborer | Michigan |
| 77 | Katherine B Phillips | 52 | Head | 0 | Poland |
| 78 | Edward Phillips | 19 | Son | New Worker | Michigan |
| 79 | Henry C Phillips | 17 | Son | New Worker | Michigan |
| 80 | Walter F Taymaki | 32 | Head | Laborer | Michigan |
Pedigree Summary
Mary
Gen 1 · 3 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)