YourRoots by Genomelink
Sign up free
MK

Mary Kozlowski — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Kings-County, New York

Our Model Tree links this Mary Kozlowski across the 1930 and 1940 US Censuses in Kings-County, New York (XGBoost, ~Confirmed) — first a spouse (b.~1884), then head of a 10-person household.

Age 56 b. ~1884 Female Spouse Born: Poland Married

1940 Census Record Details

Census Year1940
LocationKings-County, New York
SurnameKozlowski
Given NameMary
Relationship to HeadWife
SexF
Color / RaceWhite
Age56
Marital StatusMarried
BirthplacePoland
1935 Residence (City)New York City
1935 Residence (County)Kings
Naturalization StatusNaturalized
Additional Details
Class of Worker0
Hours Worked0
Highest GradeNo 4
1935 ResidenceSame place
Birth CountryPoland
Birthplace (normalized)poland
Township / WardNew York City
Est. Birth Year~1884

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.

10 people recorded at the same address in the 1940 census.

Name Relation to head Relative to Mary Age Birth yr
Mary Kozlowski Spouse — 56 ~1884
Helen Kozlowski Daughter — 25 ~1915
Walter Kozlowski Son — 23 ~1917
Jennie Kozlowski Daughter — 50 ~1890
Walter Kozlowski Head — 65 ~1875
Florence Kozlowski Daughter — 15 ~1925
Victor Kozlowski Son — 17 ~1923
Victoria Kozlowski Daughter — 17 ~1923
Jennie Kozlowski Daughter — 18 ~1922
Edward Kozlowski Son — 21 ~1919

Census Appearances

1930
Bronx, New …
Spouse, age 47
Bronx, New York · implied b. ~1883 — 2 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname Kozlowski
Given Name Mary
Relationship to Head Wife
Sex F
Color / Race White
Age 47
Marital Status Married
Birthplace Poland
Naturalization Status Alien
Year of Immigration 1901
Age at First Marriage 22
Father's Birthplace Poland
Mother's Birthplace Poland
Can Read/Write Yes
Mother Tongue Polish
Birth Country Poland
Birthplace (normalized) poland
1940
Kings-County, New …
Spouse, age 56
Kings-County, New York · implied b. ~1884 — 10 household members
Surname Kozlowski
Given Name Mary
Relationship to Head Wife
Sex F
Color / Race White
Age 56
Marital Status Married
Birthplace Poland
1935 Residence (City) New York City
1935 Residence (County) Kings
Naturalization Status Naturalized
Class of Worker 0
Hours Worked 0
Highest Grade No 4
1935 Residence Same place
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.
Linked across censuses
Our Model Tree links Mary Kozlowski across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Kozlowski
Spouse · 1940 · age 56 · b. ~1884 · New York
★ 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 — Kings-County, New York Open full size

Page Contents

39 people indexed on this census page (nara:1940:m-t0627-02587-00455)

Line Name Age Relation Occupation Birthplace
1 Margaret Cich 5 Daughter — New York
2 Rosalie Cich 3 Daughter — New York
3 Mary Youngblood 68 Head — New York
4 John Dean 42 Head Laborer New York
5 Ann Dean 42 Wife Pressfeeder New York
6 John Dean 24 Son — New York
7 William Dean 16 Son — New York
8 Catherine Dean 14 Daughter — New York
9 Mary Saunders 51 Head Home Cleaner New York
10 Benjamin Niederg 55 Head Baker New York
11 William Butler 50 Head Porter New York
12 William Dean 39 Head Mach. Operator New York
13 Alice Dean 38 Wife — New York
14 William Dean 16 Son — New York
15 Edward Dean 11 Son — New York
16 Joseph Mundorf 36 Head — New York
17 Madeline Mundorf 27 Wife 300 New York
18 Joseph M. Mundorf 11 Son — New York
19 Edward Mundorf 9 Son — New York
20 Joan Mundorf 1 Daughter — New York
21 Edward W. Mundorf 71 Father Proprietor New York
22 Jacob Mundorf 78 Brother Cleaner New York
23 Joseph Bomba 52 Head Proprietor Poland
24 Wife Bomba 43 Wife Cleaner Poland
25 Edward Bomba 16 Son — New York
26 Gilbert Bomba 8 Son — New York
27 Arthur Bomba 5 Son — New York
28 James Bhaduri 50 Head Pressfeeder New York
29 Mary Bhaduri 30 Wife — New Jersey
30 Walter Kozlowski 65 Head 480 Poland
31 Mary Kozlowski THIS PERSON 56 Wife — Poland
32 Helen Kozlowski 25 Daughter Laundress New York
33 Walter Kozlowski 23 Son Painter New York
34 Edward Kozlowski 21 Son Laundress New York
35 Victor Kozlowski 17 Son Laborer New York
36 Victoria Kozlowski 17 Daughter — New York
37 Florence Kozlowski 15 Daughter — New York
38 Jennie Kozlowski 50 Daughter Inspector New York
39 Jennie Kozlowski 18 Daughter — New York

Search for Mary Kozlowski

All Mary Kozlowski Census Records Discover Kozlowski Family Tree

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)

Report inaccurate data
👤 View Profile 🌳 Ancestors 👥 Descendants