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.~1866), then head of a 8-person household.

Age 54 b. ~1866 Male Head Born: Poland 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	54
Marital Status	Married
Birthplace	Poland
Year of Immigration	1890
Naturalization Status	Naturalized
Father's Birthplace	Poland
Mother's Birthplace	Poland
Additional Details
Occupation	Laborer
Industry	Steel Plant
Class of Worker	W
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Mother Tongue	Polish
Home Owned/Rented	R
Birth Country	Poland
Year of Naturalization	1911
Birthplace (normalized)	poland
Occupation	Laborer
Township / Ward	Depew Village
Est. Birth Year	~1866

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.

8 people recorded at the same address in the 1920 census.

Name	Relation to head	Relative to John	Age	Birth yr
Stanley Kozlowski	Other	—	32	~1888
Mike Kozlowski	Son	—	24	~1896
John Kozlowski	Head	—	54	~1866
Joseph Kozlowski	Other	—	45	~1875
Julia Kozlowski	Spouse	—	50	~1870
Mary Kozlowski	Daughter	—	17	~1903
Alexander Kozlowski	Son	—	26	~1894
Andrew Kozlowski	Son	—	17	~1903

Census Appearances

1910

Erie, New …

Head, age 42

Erie, New York · implied b. ~1868 — 50 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Kozlowski
Given Name	John
Relationship to Head	Head
Sex	M
Color / Race	White
Age	42
Marital Status	Married
Birthplace	Poland
Years Married	14
Year of Immigration	1902
Naturalization Status	First papers filed
Father's Birthplace	Poland
Mother's Birthplace	Poland
Occupation	Laborer
Industry	Railroad
Can Read	Yes
Can Write	Yes
Speaks English	No
Birth Country	Poland
Birthplace (normalized)	poland

1920

Erie, New …

Head, age 54

Erie, New York · implied b. ~1866 — 8 household members

Surname	Kozlowski
Given Name	John
Relationship to Head	Head
Sex	M
Color / Race	White
Age	54
Marital Status	Married
Birthplace	Poland
Year of Immigration	1890
Naturalization Status	Naturalized
Father's Birthplace	Poland
Mother's Birthplace	Poland
Occupation	Laborer
Industry	Steel Plant
Class of Worker	W
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Mother Tongue	Polish
Home Owned/Rented	R
Birth Country	Poland
Year of Naturalization	1911
Birthplace (normalized)	poland

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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Anchor record

John Kozlowski

Head · 1920 · age 54 · b. ~1866 · 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:1920:14thcensusofpopu1109unit:0953)

Line	Name	Age	Relation	Occupation	Birthplace
51	Mary Caffalo	23	Wife	—	Italy
52	Dominick Caffalo	10	Son	—	New York
53	Mary Caffalo	9	Daughter	—	New York
54	Viola Caffalo	7	Daughter	—	New York
55	Rose Caffalo	5	Daughter	—	New York
56	Joseph Caffalo	2	Son	—	New York
57	Samuel Taler	35	Boarder	Molder	Italy
58	John Kozlowski THIS PERSON	54	Head	Laborer	Poland
59	Julia Kozlowski	50	Wife	—	Poland
60	Mary Kozlowski	17	Daughter	Student	New York
61	Alexander Kozlowski	26	Son	Baggage	New York
62	Mike Kozlowski	24	Son	—	New York
63	Andrew Kozlowski	17	Son	—	New York
64	Stanley Kozlowski	32	Boarder	Laborer	Poland
65	Joseph Kozlowski	45	Boarder	Laborer	Poland
66	Frank Caffalo	30	Head	Molder	Italy
67	Mary Caffalo	25	Wife	—	Italy
68	Lizzie Caffalo	25	Boarder	—	Italy
69	Samuel Caffalo	25	Boarder	Laborer	Italy
70	Frank Caffalo	30	Boarder	Laborer	Italy
71	William Caffalo	40	Boarder	Laborer	Italy
72	Anthony Caffalo	25	Boarder	Laborer	Italy
73	Anthony Kozlowski	39	Head	Laborer	Poland
74	Victoria Kozlowski	33	Wife	—	Poland
75	Helen Kozlowski	9	Daughter	—	New York
76	Alice Kozlowski	7	Daughter	—	New York
77	Lawrence Smith	37	Boarder	Molder	Poland
78	John Kozlowski	27	Boarder	Molder	Poland
79	Joseph Kozlowski	37	Boarder	Laborer	Poland
80	Vincent Kozlowski	32	Boarder	Laborer	Poland
81	Adam Kozlowski	52	Boarder	Laborer	Poland
82	Ignatz Kozlowski	41	Boarder	Laborer	Poland
83	Peter Kozlowski	42	Boarder	Laborer	Poland
84	Alexander Kozlowski	36	Boarder	Laborer	Russia
85	Marian Kozlowski	30	Head	Butcher	Poland
86	Victoria Kozlowski	24	Wife	—	New York
87	Mary Kozlowski	4	Daughter	—	New York
88	Joseph Kozlowski	36	Boarder	Laborer	Poland
89	Joseph Kozlowski	52	Head	Shoemaker	Italy
90	Mary Kozlowski	46	Wife	Housekeeper	Germany
91	Mary Kozlowski	20	Daughter	—	Germany
92	Joseph Kozlowski	18	Son	Molder	Germany
93	John Kozlowski	16	Son	Coremaker	Germany
94	Theresa Kozlowski	15	Daughter	Timekeeper	New York
95	Barbara Kozlowski	13	Daughter	Skimmer	New York
96	Elizabeth Kozlowski	11	Daughter	Clerk	New York
97	John Kozlowski	48	Head	—	Poland
98	Josephine Kozlowski	40	Wife	—	Poland
99	John Kozlowski	19	Son	Coremaker	New York
100	Victoria Kozlowski	17	Daughter	Coremaker	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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