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Mary Mcelroy — 1940 US Census Record

Linked across censuses

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

Our Model Tree links this Mary Mcelroy across the 1930 and 1940 US Censuses in New-York-County, New York (XGBoost, ~Confirmed) — first a daughter (b.~1923), then head of a 6-person household.

Age 17 b. ~1923 Female Daughter Born: New York Single

1940 Census Record Details

Census Year1940
LocationNew-York-County, New York
SurnameMcElroy
Given NameMary
Relationship to HeadDaughter
SexF
Color / RaceWhite
Age17
Marital StatusSingle
BirthplaceNew York
1935 Residence (City)New York City
1935 Residence (County)New York
Additional Details
Highest GradeH 3
1935 ResidenceSame place
Birth StateNew York
Birth CountryUnited States
Birthplace (normalized)new york
Township / WardNew York City
Est. Birth Year~1923

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.

6 people recorded at the same address in the 1940 census.

Name Relation to head Relative to Mary Age Birth yr
Alice Mcelroy Spouse — 41 ~1899
Mary Mcelroy Daughter — 17 ~1923
Alice Mcelroy Daughter — 8 ~1932
Edward Mcelroy Son — 23 ~1917
John Mcelroy Head — 45 ~1895
Margaret Mcelroy Daughter — 15 ~1925

Census Appearances

1930
New York, …
Daughter, age 7
New York, New York · implied b. ~1923 — 5 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname McElroy
Given Name Mary
Relationship to Head Daughter
Sex F
Color / Race White
Age 7
Marital Status Single
Birthplace New York
Father's Birthplace New York
Mother's Birthplace New York
Can Read/Write No
Birth State New York
Birth Country United States
Birthplace (normalized) new york
1940
New-York-County, New …
Daughter, age 17
New-York-County, New York · implied b. ~1923 — 6 household members
Surname McElroy
Given Name Mary
Relationship to Head Daughter
Sex F
Color / Race White
Age 17
Marital Status Single
Birthplace New York
1935 Residence (City) New York City
1935 Residence (County) New York
Highest Grade H 3
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 Mcelroy across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Mcelroy
Daughter · 1940 · age 17 · b. ~1923 · New York
★ You are viewing this record
Sibling
Alice Mcelroy
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Mcelroy
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Mcelroy
Sibling · 1940 · age 15
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 — New-York-County, New York Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-02658-00177)

Line Name Age Relation Occupation Birthplace
41 Anthony Trojan 38 Head Laborer New York
42 Anna Trojan 20 Sister Worker New York
43 Theresa Kading 64 Head — Germany
44 Eleanor Siedett 21 Grand-son — New York
45 John Riechen 69 Head Machinist Austria
46 Henry Wolabert 63 Partner Porter Germany
47 Sebastian Rothenberger 76 Head — Germany
48 Katie Rothenberger 76 Wife — Germany
49 Lina Arnold 53 Head Nurse Practical Germany
50 Christina Beile 74 Head — Austria
51 Katherine Cavanaugh 58 Head — Irish Free State
52 John Cavanaugh 18 Son — New York
53 John Mcelroy 45 Head Driver New York
54 Alice Mcelroy 41 Wife Matron New York
55 Edward Mcelroy 23 Son Elevator Operator New York
56 Mary Mcelroy THIS PERSON 17 Daughter — New York
57 Margaret Mcelroy 15 Daughter — New York
58 Alice Mcelroy 8 Daughter — New York
59 George Jr. Strohm 69 Head — New York
60 Lillie Strohm 67 Wife — Germany
61 Ernest Rischer 37 Head Elevator Operator Germany
62 Mary Rischer 31 Wife — Hungary
63 Rudolph Rischer 2 Son — New York
64 Charles Neureiter 73 Head — Germany
65 Adelaide Neureiter 64 Wife — Germany
66 William Neureiter 15 Grand-son — New York
67 Louis Neureiter 13 Grand-son — New York
68 Antoinette Fund 46 Head Lunchroom Germany
69 Marie Fund 20 Daughter Stenographer New York
70 Arthur H. Burke 36 Head Printer New York
71 Katherine Burke 40 Wife — New York
72 Katherine C. Burke 11 Daughter — New York
73 James J. Lynch 42 Head Porter Pennsylvania
74 Alice Lynch 39 Wife — Irish Free State
75 Vincent Lynch 14 Son — New York
76 George Mary Eley 63 Head — Hungary
77 Rose Lukash 52 Head Janitor New York
78 Evelyn C. Lukash 23 Daughter Chamber-Maid New York
79 Herbert Lukash 21 Son Chamber-Maid New York
80 Emma Lukash 19 Daughter Sprayer 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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