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Mary Kowalski — 1930 US Census Record

Linked across censuses

1930 United States Federal Census · Montgomery, New York

Our Model Tree links this Mary Kowalski across the 1920 and 1930 US Censuses in Montgomery, New York (XGBoost, ~Confirmed) — first a daughter (b.~1913), then head of a 9-person household.

Age 17 b. ~1913 Female Daughter Born: New York Single

1930 Census Record Details

Census Year1930
LocationMontgomery, New York
SurnameKowalski
Given NameMary
Relationship to HeadDaughter
SexF
Color / RaceWhite
Age17
Marital StatusSingle
BirthplaceNew York
Father's BirthplacePoland
Mother's BirthplacePoland
Additional Details
Can Read/WriteYes
Birth StateNew York
Birth CountryUnited States
Birthplace (normalized)new york
Township / WardFlorida Town
Est. Birth Year~1913

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.

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

Name Relation to head Relative to Mary Age Birth yr
Benjamin Kowalski Son — 14 ~1916
Mary Kowalski Daughter — 17 ~1913
Josephine Kowalski Daughter — 16 ~1914
Isabelle Kowalski Daughter — 6 ~1924
Marion Kowalski Head — 44 ~1886
Wanda Kowalski Daughter — 7 ~1923
Mary Kowalski Spouse — 41 ~1889
Regina Kowalski Daughter — 12 ~1918
Irene Kowalski Daughter — 2 ~1928

Census Appearances

1920
Montgomery, New …
Daughter, age 6
Montgomery, New York · implied b. ~1914 — 7 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname Kowalski
Given Name Mary
Relationship to Head Daughter
Sex F
Color / Race White
Age 6
Marital Status Single
Birthplace New York
Father's Birthplace Poland
Mother's Birthplace Poland
Birth State New York
Birth Country United States
Birthplace (normalized) new york
1930
Montgomery, New …
Daughter, age 17
Montgomery, New York · implied b. ~1913 — 9 household members
Surname Kowalski
Given Name Mary
Relationship to Head Daughter
Sex F
Color / Race White
Age 17
Marital Status Single
Birthplace New York
Father's Birthplace Poland
Mother's Birthplace Poland
Can Read/Write Yes
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.
Linked across censuses
Our Model Tree links Mary Kowalski across 2 US Census years (1920 and 1930) in Montgomery, New York, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Kowalski
Daughter · 1930 · age 17 · b. ~1913 · New York
★ You are viewing this record
Sibling
Irene Kowalski
Sibling · 1930 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Josephine Kowalski
Sibling · 1930 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Isabelle Kowalski
Sibling · 1930 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Benjamin Kowalski
Sibling · 1930 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Wanda Kowalski
Sibling · 1930 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Regina Kowalski
Sibling · 1930 · age 12
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 — Montgomery, New York Open full size

Page Contents

50 people indexed on this census page (ia:1930:newyorkcensus00reel1456:0948)

Line Name Age Relation Occupation Birthplace
51 David Humphrey 41 Laborer Laborer New York
52 Albert H. Humphrey 7 Son — New York
53 James Duffey 78 Head — New York
54 Villa Duffey 76 Wife — New York
55 Frank Augusta 45 Head Farmer Russia Poland
56 Sadie Augusta 46 Wife — Russia Poland
57 Leon Augusta 25 Son Mill Worker New York
58 Edward Augusta 13 Son — New York
59 Raymond Augusta 8 Son — New York
60 Leland H. Herrick 33 Head Farmer New York
61 Dora B. Herrick 29 Wife — New York
62 Shirley D. Herrick 2 Daughter — New York
63 Katherine Waurzonek 39 Head Farmer Aust Poland
64 Blanche Waurzonek 17 Daughter — Aust Poland
65 John F. Waurzonek 12 Son — New York
66 Richard K. Waurzonek 3 Son — New York
67 Chester Waurzonek 0 Son — New York
68 Leo J. Jaworski 20 Step-son Mechanic New York
69 Peter J. Jaworski 14 Step-son — New York
70 Jennie K. Jaworski 8 Step-daughter — New York
71 Peter M. Brusick 44 Head Farmer Poland
72 Rose Brusick 41 Wife — Poland
73 Sofia N. Brusick 12 Daughter — New York
74 Martin Poslushny 50 Boarder Laborer Poland
75 Carl Herry 62 Head Farmer New York
76 Eliza Herry 63 Wife — New York
77 Amelia H. Haskin 49 Head Mechanic New York
78 Estella M. Haskin 38 Wife-daughter — New York
79 John E. Haskin 50 Son — New York
80 Gertrude Haskin 73 Daughter-in-law — New York
81 Howard E. Herry 37 Head Farmer New York
82 Alma M. Herry 41 Wife — New York
83 Harold E. Herry 14 Son — New York
84 Laura M. Herrick 71 Mother-in-law — New York
85 Arthur Herry 47 Head Farmer New York
86 Bessie Haskin 38 Housekeeper Housekeeper New York
87 Arnold B. Walker 25 Cousin Salesman New York
88 Marion Kowalski 44 Head Loom Fixer Poland
89 Mary Kowalski 41 Wife — Poland
90 Mary Kowalski THIS PERSON 17 Daughter — New York
91 Josephine Kowalski 16 Daughter — New York
92 Benjamin Kowalski 14 Son — New York
93 Regina Kowalski 12 Daughter — New York
94 Wanda Kowalski 7 Daughter — New York
95 Isabelle Kowalski 6 Daughter — New York
96 Irene Kowalski 2 Daughter — New York
97 Walter W. Novosic 44 Head Farmer Poland
98 Anna Novosic 46 Wife — Poland
99 Winifred Novosic 22 Daughter — Poland
100 Stella Novosic 20 Daughter Mill Worker Poland

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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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