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Mary Hartman — 1940 US Census Record

Linked across censuses

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

Our Model Tree links this Mary Hartman across the 1930 and 1940 US Censuses in Erie-County, New York (XGBoost, ~Confirmed) — first a daughter (b.~1917), then head of a 9-person household.

Age 23 b. ~1917 Female Daughter Born: New York Single

1940 Census Record Details

Census Year1940
LocationErie-County, New York
SurnameHartman
Given NameMary
Relationship to Headdaughter
SexF
Color / RaceWhite
Age23
Marital StatusSingle
BirthplaceNew York
1935 Residence (City)Buffalo City
1935 Residence (County)Erie
Additional Details
Occupationhousework
Industryprivate family
Class of WorkerPW
Hours Worked40
Income (1939)410
Highest GradeNo 8
1935 ResidenceSame place
Birth StateNew York
Birth CountryUnited States
Birthplace (normalized)new york
OccupationHousework
Township / WardBuffalo City
Est. Birth Year~1917

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 1940 census.

Name Relation to head Relative to Mary Age Birth yr
Rita Hartman Daughter — 16 ~1924
Mary Hartman Daughter — 23 ~1917
Irene Hartman Daughter — 8 ~1932
August Hartman Head — 52 ~1888
Marian Hartman Son — 14 ~1926
Edward Hartman Son — 20 ~1920
Richard Hartman Son — 12 ~1928
August Hartman Son — 21 ~1919
Stella Hartman Spouse — 41 ~1899

Census Appearances

1930
Erie, New …
Daughter, age 13
Erie, New York · implied b. ~1917 — 50 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname Hartman
Given Name Mary
Relationship to Head Daughter
Sex F
Color / Race White
Age 13
Marital Status Single
Birthplace New York
Father's Birthplace Austria
Mother's Birthplace Austria
Can Read/Write Yes
Birth State New York
Birth Country United States
Birthplace (normalized) new york
1940
Erie-County, New …
Daughter, age 23
Erie-County, New York · implied b. ~1917 — 9 household members
Surname Hartman
Given Name Mary
Relationship to Head daughter
Sex F
Color / Race White
Age 23
Marital Status Single
Birthplace New York
1935 Residence (City) Buffalo City
1935 Residence (County) Erie
Occupation housework
Industry private family
Class of Worker PW
Hours Worked 40
Income (1939) 410
Highest Grade No 8
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.
Linked across censuses
Our Model Tree links Mary Hartman across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Hartman
Daughter · 1940 · age 23 · b. ~1917 · New York
★ You are viewing this record
Sibling
Marian Hartman
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Hartman
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
August Hartman
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Hartman
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rita Hartman
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Irene Hartman
Sibling · 1940 · age 8
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

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

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-02837-00125)

Line Name Age Relation Occupation Birthplace
41 Ginal, Mathew Cook 19 son Machinist New York
42 Edward Cook 17 son — New York
43 Viola Cook 14 daughter — New York
44 Matthew Szczepanski 28 head Steel Worker New York
45 Mary Szczepanski 21 wife Wreath Maker New York
46 Barbara Szczepanski 2 daughter — New York
47 Joseph Wegrzynowski 47 head Grinder Poland
48 Marian Wegrzynowski 43 wife — Poland
49 Olga Wegrzynowski 19 daughter Housework New York
50 Thadeus Wegrzynowski 18 son New Worker New York
51 Edmund Wegrzynowski 10 son — New York
52 Felix Wegrzynowski 1 son — New York
53 Walter Kita 27 head Inspector New York
54 Alice Kita 23 wife — New York
55 Donald Kita 0 son — New York
56 Casimer Norman 29 head Riveter New York
57 Celia Norman 24 wife — New York
58 David Norman 2 son — New York
59 Stella Wajchert 56 mother in law — Poland
60 Jan Mizialik 43 head Laborer Poland
61 Rosalie Mizialik 42 wife — Poland
62 Ignatius Lazarczyk 54 lodger Moulder Poland
63 Katherine Lazarczyk 48 lodger — Poland
64 Jennie Lazarczyk 25 lodger daughter Wind Shield Wiper Assembler New York
65 Irene Lazarczyk 17 lodger daughter — New York
66 Joseph Nowak 47 lodger Moulder Helper Poland
67 August Hartman 52 head Pasteurizing Machine Operator Germany
68 Stella Hartman 41 wife — Austria
69 Mary Hartman THIS PERSON 23 daughter Housework New York
70 August Jr Hartman 21 son — New York
71 Edward Hartman 20 son New Worker New York
72 Rita Hartman 16 daughter — New York
73 Marian Hartman 14 son — New York
74 Richard Hartman 12 son — New York
75 Irene Hartman 8 daughter — New York
76 John Staniszewski 43 head Moulder Russia
77 Anna Staniszewski 56 wife — Poland
78 August Jakub 50 head — Austria
79 Barbara Jakub 42 wife — Austria
80 Frank E Christey 43 head Garage Operator New York

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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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