Mary Kozlowski — 1940 US Census Record

Linked across censuses

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

Our Model Tree links this Mary Kozlowski across the 1920, 1930 and 1940 US Censuses in Westchester-County, New York (XGBoost, ~Confirmed) — first a spouse (b.~1895), then head of a 4-person household.

Age 45 b. ~1895 Female Spouse Born: Lithuania Married

1940 Census Record Details

Census Year	1940
Location	Westchester-County, New York
Surname	Kozlowski
Given Name	Mary
Relationship to Head	wife
Sex	F
Color / Race	White
Age	45
Marital Status	Married
Birthplace	Lithuania
1935 Residence (City)	Port Chester
1935 Residence (County)	Westchester
Naturalization Status	Alien
Additional Details
Income (1939)	0
Highest Grade	No 0
1935 Residence	Same place
Birth Country	Lithuania
Birthplace (normalized)	lithuania
Township / Ward	Port Chester
Est. Birth Year	~1895

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.

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

Name	Relation to head	Relative to Mary	Age	Birth yr
George Kozlowski	Son	—	24	~1916
Alex Kozlowski	Head	—	59	~1881
Mary Kozlowski	Spouse	—	45	~1895
May Kozlowski	Daughter	—	22	~1918

Census Appearances

1920

Philadelphia, Pennsylvania

Spouse, age 25

Philadelphia, Pennsylvania · implied b. ~1895 — 4 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Kizlowskas
Given Name	Mary
Relationship to Head	wife
Sex	F
Color / Race	White
Age	25
Marital Status	Married
Birthplace	Lithuania
Year of Immigration	1913
Naturalization Status	Alien
Father's Birthplace	Lithuania
Mother's Birthplace	Lithuania
Occupation	none
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Mother Tongue	Lithuanian
Birth Country	Lithuania
Birthplace (normalized)	lithuania

1930

Kings, New …

Other, age 36

Kings, New York · implied b. ~1894 — 4 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Kozlowskas
Given Name	Mary
Relationship to Head	Wife-H
Sex	F
Color / Race	White
Age	36
Marital Status	Married
Birthplace	Lithuania
Naturalization Status	Naturalized
Year of Immigration	1913
Age at First Marriage	14
Father's Birthplace	Lithuania
Mother's Birthplace	Lithuania
Occupation	none
Can Read/Write	Yes
Mother Tongue	Lithuanian
Birth Country	Lithuania
Birthplace (normalized)	lithuania

1940

Westchester-County, New …

Spouse, age 45

Westchester-County, New York · implied b. ~1895 — 4 household members

Surname	Kozlowski
Given Name	Mary
Relationship to Head	wife
Sex	F
Color / Race	White
Age	45
Marital Status	Married
Birthplace	Lithuania
1935 Residence (City)	Port Chester
1935 Residence (County)	Westchester
Naturalization Status	Alien
Income (1939)	0
Highest Grade	No 0
1935 Residence	Same place
Birth Country	Lithuania
Birthplace (normalized)	lithuania

Model Tree

Linked across censuses

Our Model Tree links Mary Kozlowski across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage.

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This person

Anchor record

Mary Kozlowski

Spouse · 1940 · age 45 · b. ~1895 · New York

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Confirmed / household (~0.90+) Probable / derived (~0.65–0.89) Candidate (<0.65, unverified)

Original Census Page

1940 US Federal Census — Westchester-County, New York Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-02812-00552)

Line	Name	Age	Relation	Occupation	Birthplace
41	Alex Kozlowski	59	head	Barber	Lithuania
42	Mary Kozlowski THIS PERSON	45	wife	—	Lithuania
43	George Kozlowski	24	son	Barber	New York
44	May Kozlowski	22	daughter	Cook	Canada English
45	Paul Hofner	45	head	Proprietor	Denmark
46	Elsie Hofner	39	wife	Laundress	Denmark
47	Paul Hofner	15	son	—	New York
48	John Hofner	13	son	—	New York
49	Alice Hofner	11	daughter	—	New York
50	Joseph Bessinger	56	head	Machinist	New York
51	Mary Bessinger	58	wife	—	Conn
52	Louis Bessinger	58	head	Machinist	New York
53	Ida Bessinger	54	wife	—	New York
54	Lester Bessinger	27	son	Sales Clerk	New York
55	Daniel Coviello	38	head	Painter	Italy
56	Edna Coviello	48	wife	—	Canada English
57	Frances Bookhausen	23	daughter	—	New York
58	William Bookhausen	21	step son	App. Painter	New York
59	Edna A. Bookhausen	20	step daughter	Secretarial	New York
60	Joseph R. Coviello	15	son	—	New York
61	Fritz Steinhouse	65	head	—	Prussia
62	Agnes Steinhouse	52	wife	Cashier	Penn
63	Bernard Selle	34	head	—	New York
64	Roy Selle	35	brother	Accountant	New York
65	James A. Rouse	26	head	Life Saver	New York
66	Grace C. Rouse	35	wife	Gen Office Work	Florida
67	William Merritt	43	head	Plumber	New York
68	Minna Merritt	45	wife	—	New York
69	Melma Merritt	18	daughter	—	New York
70	Rita Merritt	15	daughter	—	New York
71	William Merritt	11	son	—	New York
72	Harry Burton	51	head	Laborer	Conn
73	Margaret Burton	50	wife	—	Irish Free State
74	Mary Burton	19	daughter	—	New York
75	Lillian Burton	14	daughter	—	New York
76	Harry Jr. Burton	12	son	—	New York
77	Arthur Norden	51	head	Electrician	Maryland
78	Ann Norden	50	wife	Asst. Sales	Penn
79	Norman Norden	24	son	Salesman	Penn
80	Susie Rockey	68	nurse	—	Penn

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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)

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