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John Kowalski — 1930 US Census Record

Model Tree available

1930 United States Federal Census · Erie, New York

Our Model Tree links this John Kowalski across the 1920, 1930 and 1940 US Censuses in Erie, New York (XGBoost, ~Confirmed), with identified parents Anthony & Wladyslaw — first a son (b.~1911), then head of a 5-person household.

Age 19 b. ~1911 Male Son Born: New York Single

1930 Census Record Details

Census Year1930
LocationErie, New York
SurnameKowalski
Given NameJohn
Relationship to HeadSon
SexM
Color / RaceWhite
Age19
Marital StatusSingle
BirthplaceNew York
Father's BirthplacePoland
Mother's BirthplacePoland
Additional Details
OccupationMail Porter
IndustryRailroad
Class of WorkerW
Can Read/WriteYes
Birth StateNew York
Birth CountryUnited States
Birthplace (normalized)new york
OccupationMail Porter
Township / WardLackawanna
Est. Birth Year~1911

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.

5 people recorded at the same address in the 1930 census.

Name Relation to head Relative to John Age Birth yr
Wladyslaw Kowalski Head — 54 ~1876
Helen Kowalski Spouse — 49 ~1881
Cordelia Kowalski Daughter — 13 ~1917
Victoria Kowalski Daughter — 10 ~1920
John Kowalski Son — 19 ~1911

Census Appearances

1920
Erie, New …
Son, age 8
Erie, New York · implied b. ~1912 — 7 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname Kowalski
Given Name John
Relationship to Head Son
Sex M
Color / Race White
Age 8
Marital Status Single
Birthplace New York
Father's Birthplace Poland
Mother's Birthplace Poland
Can Read Yes
Can Write Yes
Speaks English Yes
Mother Tongue Polish
Birth State New York
Birth Country United States
Birthplace (normalized) new york
1930
Erie, New …
Son, age 19
Erie, New York · implied b. ~1911 — 5 household members
Surname Kowalski
Given Name John
Relationship to Head Son
Sex M
Color / Race White
Age 19
Marital Status Single
Birthplace New York
Father's Birthplace Poland
Mother's Birthplace Poland
Occupation Mail Porter
Industry Railroad
Class of Worker W
Can Read/Write Yes
Birth State New York
Birth Country United States
Birthplace (normalized) new york
1940
Erie-County, New …
Head, age 29
Erie-County, New York · implied b. ~1911 — 3 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname Kowalske
Given Name John A.
Relationship to Head Head
Sex M
Color / Race White
Age 29
Marital Status Married
Birthplace New York
1935 Residence (City) Orchard Park Town
1935 Residence (County) Erie
Occupation Stationary Fireman
Industry Manufacturing Company
Class of Worker PW
Hours Worked 40
Income (1939) 492
Highest Grade No 4
1935 Residence Same place
Birth State New York
Birth Country United States
Birthplace (normalized) new york

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.
Model Tree available
Our Model Tree links John Kowalski across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Anthony Kowalski (~0.92 confidence) and father Wladyslaw Kowalski (~0.92 confidence) and mother Helen Kowalski (~0.92 confidence) and mother Rose Kowalski (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1 Parents confidence ≈ 0.92
Father
Anthony Kowalski
b. ~1875
Source father
● Household · direct · ~0.92
Father
Wladyslaw Kowalski
b. ~1876
Source father
● Household · direct · ~0.92
Mother
Helen Kowalski
b. ~1881
Source mother
● Household · direct · ~0.92
Mother
Rose Kowalski
b. ~1885
Source mother
● Household · direct · ~0.92
This person
Anchor record
John Kowalski
Son · 1930 · age 19 · b. ~1911 · New York
★ You are viewing this record
Sibling
Victoria Kowalski
Sibling · 1930 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Cordelia Kowalski
Sibling · 1930 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+) Probable / derived (~0.65–0.89) Candidate (<0.65, unverified)

Original Census Page

1930 US Federal Census — Erie, New York Open full size

Page Contents

50 people indexed on this census page (ia:1930:newyorkcensus00reel1620:0698)

Line Name Age Relation Occupation Birthplace
1 John Wadnick 11 Head — New York
2 Frank Killer 34 Head Iron Forger Poland
3 Annie Killer 34 Wife — Poland
4 John Killer 13 Son — New York
5 Helen Killer 12 Daughter — New York
6 Mary Killer 10 Daughter — New York
7 Frank Killer 8 Son — New York
8 Edward Killer 6 Son — New York
9 Thomas Kowalczyk 34 Head Laborer Poland
10 Agatha Kowalczyk 42 Wife — Poland
11 Ignatz Kowalczyk 15 Son Laborer New York
12 John Kowalczyk 14 Son — New York
13 Annie Kowalczyk 12 Daughter — New York
14 Jennie Kowalczyk 11 Daughter — New York
15 Mary Kowalczyk 7 Daughter — New York
16 Helen Kowalczyk 3 Daughter — New York
17 Michael Yetz 43 Head Moulder Poland
18 Agatha Yetz 42 Wife — Poland
19 John Yetz 17 Son — New York
20 Jennie Yetz 14 Daughter — New York
21 Joseph Yetz 11 Son — New York
22 Ignacy Kowalski 38 Head Machine Moulder Poland
23 Stella Kowalski 38 Wife — Poland
24 Edward L. Kowalski 15 Son Caddy New York
25 Helen C. Kowalski 12 Daughter — New York
26 Gladys Kowalski 6 Daughter — New York
27 John Kowalski 3 Son — New York
28 Wladyslaw Kowalski 54 Head Grocer Poland
29 Helen Kowalski 49 Wife — Poland
30 John Kowalski THIS PERSON 19 Son Mail Porter New York
31 Cordelia Kowalski 13 Daughter — New York
32 Victoria Kowalski 10 Daughter — New York
33 Thomas Kula 48 Head Moulder Poland
34 Katherine Kula 38 Wife — Poland
35 Mary Kula 21 Daughter Servant New York
36 Helen Kula 17 Daughter — New York
37 Stella Kula 15 Daughter — New York
38 Cecelia Kula 13 Daughter — New York
39 John Kula 11 Son — New York
40 Matthew Kula 8 Son — New York
41 Andrew Libertowski 52 Head — Poland
42 Katherine Libertowski 50 Wife — Poland
43 Albert Libertowski 16 Son — New York
44 John Libertowski 11 Son — New York
45 Mary Libertowski 10 Daughter — New York
46 Joseph Libertowski 8 Son — New York
47 Anna Libertowski 7 Daughter — New York
48 Frank Libertowski 5 Son — New York
49 John Konicka 51 Head Core Maker Russia
50 Agatha Konicka 47 Wife — Poland

Search for John Kowalski

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Pedigree Summary

John + 2 siblings
Gen 1 · 4 parents ~0.92
Max depth 4 (1900–1950 window)

About This Record & Model Tree

This record was independently indexed by YourRoots from the 1930 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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