John Kozlowski — 1920 US Census Record

Linked across censuses

1920 United States Federal Census · Erie, New York

Our Model Tree links this John Kozlowski across the 1910 and 1920 US Censuses in Erie, New York (XGBoost, ~Confirmed) — first a head (b.~1874), then head of a 7-person household.

Age 46 b. ~1874 Male Head Born: Russia Polish Married

1920 Census Record Details

Census Year	1920
Location	Erie, New York
Surname	Kozlowski
Given Name	John
Relationship to Head	Head
Sex	M
Color / Race	White
Age	46
Marital Status	Married
Birthplace	Russia Polish
Year of Immigration	1896
Naturalization Status	Naturalized
Father's Birthplace	Russia Polish
Mother's Birthplace	Russia Polish
Additional Details
Occupation	Carman
Industry	Railroad
Class of Worker	W
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Mother Tongue	Polish
Home Owned/Rented	O
Home Free/Mortgaged	M
Year of Naturalization	1902
Birthplace (normalized)	russia polish
Occupation	Carman
Township / Ward	Buffalo City
Est. Birth Year	~1874

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 1920 census.

Name	Relation to head	Relative to John	Age	Birth yr
John Kozlowski	Head	—	46	~1874
Stanislawa Kozlowski	Spouse	—	37	~1883
Genevieve Kozlowski	Daughter	—	15	~1905
Edward Kozlowski	Son	—	17	~1903
Valentine Kozlowski	Daughter	—	9	~1911
Marianna Kozlowski	Other	—	63	~1857
Florence Kozlowski	Daughter	—	4	~1916

Census Appearances

1910

Erie, New …

Head, age 37

Erie, New York · implied b. ~1873 — 4 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Kozlowski
Given Name	John
Relationship to Head	Head
Sex	M
Color / Race	White
Age	37
Marital Status	Married
Birthplace	Russia Polish
Years Married	12
Year of Immigration	1896
Naturalization Status	First papers filed
Father's Birthplace	Russia Polish
Mother's Birthplace	Russia Polish
Occupation	Laborer
Industry	Iron Foundry
Can Read	Yes
Can Write	Yes
Speaks English	Polish
Birthplace (normalized)	russia polish

1920

Erie, New …

Head, age 46

Erie, New York · implied b. ~1874 — 7 household members

Surname	Kozlowski
Given Name	John
Relationship to Head	Head
Sex	M
Color / Race	White
Age	46
Marital Status	Married
Birthplace	Russia Polish
Year of Immigration	1896
Naturalization Status	Naturalized
Father's Birthplace	Russia Polish
Mother's Birthplace	Russia Polish
Occupation	Carman
Industry	Railroad
Class of Worker	W
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Mother Tongue	Polish
Home Owned/Rented	O
Home Free/Mortgaged	M
Year of Naturalization	1902
Birthplace (normalized)	russia polish

Model Tree

Linked across censuses

Our Model Tree links John Kozlowski across 2 US Census years (1910 and 1920) in Erie, New York, using XGBoost record linkage.

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This person

Anchor record

John Kozlowski

Head · 1920 · age 46 · b. ~1874 · New York

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

Original Census Page

1920 US Federal Census — Erie, New York Open full size

Page Contents

50 people indexed on this census page (ia:1920:14thcensusofpopu1101unit:0422)

Line	Name	Age	Relation	Occupation	Birthplace
1	Stanley Michalski	38	Head	Shoemaker	Galicia
2	Mary Michalski	23	Wife	—	Galicia
3	Mary Michalski	2	Daughter	—	New York
4	Helen Michalski	0	Daughter	—	New York
5	Mary Michalski	22	Sister	Sorter	Galicia
6	Peter Pietrzyk	27	Head	Undertaker	New York
7	Catherine Pietrzyk	26	Wife	—	New York
8	Mildred Pietrzyk	4	Daughter	—	New York
9	Edward Pietrzyk	1	Son	—	New York
10	Paul Pietrzyk	50	Head	Carpenter	Posen
11	Stella Pietrzyk	42	Wife	—	Posen
12	Edward Pietrzyk	22	Son	Switchman	New York
13	Felix Pietrzyk	19	Son	Switchman	New York
14	Monica Pietrzyk	13	Daughter	—	New York
15	Martha Pietrzyk	12	Daughter	—	New York
16	Benet Pietrzyk	9	Son	—	New York
17	Frank Lewandowski	30	Head	Agent	New York
18	Stella Lewandowski	28	Wife	Saleswoman	New York
19	Andrew Kanty	24	Boarder	Manager	New York
20	John Szymanski	32	Head	Carpenter	Pennsylvania
21	Mary Szymanski	32	Wife	—	Russia Polish
22	Joseph Szymanski	9	Son	—	Pennsylvania
23	Stephanie Szymanski	7	Daughter	—	New York
24	Teddy Szymanski	5	Son	—	New York
25	Sophie Szymanski	3	Daughter	—	New York
26	Doris Szymanski	1	Daughter	—	New York
27	John Kozlowski THIS PERSON	46	Head	Carman	Russia Polish
28	Stanislawa Kozlowski	37	Wife	—	New York
29	Edward Kozlowski	17	Son	Feeder	New York
30	Genevieve Kozlowski	15	Daughter	Spinner	New York
31	Valentine Kozlowski	9	Daughter	—	New York
32	Florence Kozlowski	4	Daughter	—	New York
33	Marianna Kozlowski	63	Mother-in-law	Cleaning	Posen
34	Frank Kozlowski	27	Head	Trucker	Russia Polish
35	Agnes Kozlowski	24	Wife	—	Russia Polish
36	Stephanie Kozlowski	4	Daughter	—	New York
37	Lucille Kozlowski	1	Daughter	—	New York
38	Zygmunt Kozlowski	37	Head	Owner	U.S.
39	Anna Kozlowski	31	Wife	—	New York
40	Alexander Kozlowski	6	Son	—	New York
41	Florence Kozlowski	4	Daughter	—	New York
42	Christine Kozlowski	1	Daughter	—	New York
43	Walter Kozlowski	20	Brother-in-law	Cabinet Maker	New York
44	John Kozlowski	26	Head	Fireman	New York
45	Frances Kozlowski	23	Wife	—	New York
46	Edwin Kozlowski	2	Son	—	New York
47	Andrew Kozlowski	22	Boarder	Chauffeur	New York
48	Mary Kozlowski	22	Boarder	Clerk	New York
49	Henry Kozlowski	53	Head	Dry Goods Store	Iowa
50	Anna Kozlowski	48	Wife	—	New York

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About This Record & Model Tree

This record was independently indexed by YourRoots from the 1920 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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