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William Mcgrath — 1940 US Census Record

Model Tree available

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

Our Model Tree links this William Mcgrath across the 1920, 1930 and 1940 US Censuses in New-York-County, New York (XGBoost, ~Confirmed), with identified parents Thomas & William — first a son (b.~1917), then head of a 10-person household.

Age 23 b. ~1917 Male Son Born: New York Single

1940 Census Record Details

Census Year1940
LocationNew-York-County, New York
SurnameMcGrath
Given NameWilliam
Relationship to HeadSon
SexM
Color / RaceWhite
Age23
Marital StatusSingle
BirthplaceNew York
1935 Residence (City)New York City
1935 Residence (County)New York
Additional Details
OccupationCounter man
IndustryDrug Store
Class of WorkerPW
Hours Worked44
Income (1939)1040
Highest Grade8
1935 ResidenceSame place
Birth StateNew York
Birth CountryUnited States
Birthplace (normalized)new york
OccupationCounter Man
Township / WardNew York 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.

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

Name Relation to head Relative to William Age Birth yr
Sadie Mcgrath Spouse — 43 ~1897
Mary Mcgrath Daughter — 16 ~1924
William Mcgrath Head — 46 ~1894
Anna Byrne Daughter — 22 ~1918
Harold Thompson Other — 37 ~1903
John Mcgrath Son — 24 ~1916
William Thompson Other — 51 ~1889
William Mcgrath Son — 23 ~1917
Hugh Byrne Other — 23 ~1917
Agnes Mcgrath Daughter — 18 ~1922

Census Appearances

1920
None, New …
Son, age 1
None, New York · implied b. ~1919 — 4 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname McGrath
Given Name William
Relationship to Head Son
Sex M
Color / Race White
Age 1
Marital Status Single
Birthplace New York
Father's Birthplace New York
Mother's Birthplace New York
Can Read No
Can Write No
Speaks English No
Birth State New York
Birth Country United States
Birthplace (normalized) new york
1930
New York, …
Son, age 12
New York, New York · implied b. ~1918 — 8 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname McGrath
Given Name William
Relationship to Head Son
Sex M
Color / Race White
Age 12
Marital Status Single
Birthplace New York
Age at First Marriage No
Father's Birthplace New York
Mother's Birthplace New York
Can Read/Write Yes
Birth State New York
Birth Country United States
Birthplace (normalized) new york
1940
New-York-County, New …
Son, age 23
New-York-County, New York · implied b. ~1917 — 10 household members
Surname McGrath
Given Name William
Relationship to Head Son
Sex M
Color / Race White
Age 23
Marital Status Single
Birthplace New York
1935 Residence (City) New York City
1935 Residence (County) New York
Occupation Counter man
Industry Drug Store
Class of Worker PW
Hours Worked 44
Income (1939) 1040
Highest Grade 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.
Model Tree available
Our Model Tree links William Mcgrath across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage. Identified parents: father Thomas Mcgrath (~0.92 confidence) and father William Mcgrath (~0.92 confidence) and father William Mcgrath (~0.92 confidence) and mother Ella Mcgrath (~0.92 confidence) and mother Katie Mcgrath (~0.92 confidence) and mother Sadie Mcgrath (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1 Parents confidence ≈ 0.92
Father
Thomas Mcgrath
b. ~1894
Source father
● Household · direct · ~0.92
Father
William Mcgrath
b. ~1898
Source father
● Household · direct · ~0.92
Father
William Mcgrath
b. ~1894
Source father
● Household · direct · ~0.92
Mother
Ella Mcgrath
b. ~1898
Source mother
● Household · direct · ~0.92
Mother
Katie Mcgrath
b. ~1903
Source mother
● Household · direct · ~0.92
Mother
Sadie Mcgrath
b. ~1897
Source mother
● Household · direct · ~0.92
This person
Anchor record
William Mcgrath
Son · 1940 · age 23 · b. ~1917 · New York
★ You are viewing this record
Sibling
Agnes Mcgrath
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Mcgrath
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Mcgrath
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anna Byrne
Sibling · 1940 · age 22
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-t0627-02633-00085)

Line Name Age Relation Occupation Birthplace
1 William Mcgrath 46 Head Laborer New York
2 Sadie Mcgrath 43 Wife — New York
3 John Mcgrath 24 Son Maintenance Man New York
4 William Mcgrath THIS PERSON 23 Son Counter Man New York
5 Agnes Mcgrath 18 Daughter — New York
6 Mary Mcgrath 16 Daughter — New York
7 Hugh Byrne 23 Son-in-law Laborer New York
8 Anna Byrne 22 Daughter Packer New York
9 William Thompson 51 Brother-in-law Laborer New York
10 Harold Thompson 37 Brother-in-law Laborer New York
11 Daisy Heffernan 46 Head Bath Maid New York
12 John Heffernan 18 Son Clerk New York
13 Julia Heffernan 16 Daughter — New York
14 John Killer 60 Head Driver New York
15 Grace Killer 59 Wife — New York
16 Helen Killer 12 Daughter — New York
17 Rado Asanovich 41 Head Mechanic New York
18 Madeline Asanovich 36 Wife — New York
19 Peter Asanovich 73 Father — Yugoslavia
20 Victoria Asanovich 29 Sister Packer New York
21 Mary Vicin 32 Sister-in-law Packer New York
22 Victoria Vicin 28 Sister-in-law Wrapper New York
23 John Murtha 53 Head Dock Worker New York
24 Mary Murtha 44 Wife — New York
25 John Murtha 26 Son Dock Worker New York
26 Ann Murtha 22 Daughter Sale Lady New York
27 William Murtha 21 Son Dock Worker New York
28 Catherine Murtha 17 Daughter-in-law — New York
29 Alicia Murtha 12 Daughter — New York
30 James Brackin 60 Lodger — New York
31 Mary Kelly 58 Head — New York
32 William Kelly 28 Son Mechanic New York
33 Patrick Kelly 24 Son — New York
34 Thomas Lennon 58 Head Foreman New York
35 Emma Lennon 53 Wife — New York
36 Edward Lennon 24 Son Clerk New York
37 Mary Gallagher 55 Head — New York
38 Agnes Gallagher 24 Daughter Cashier New York
39 Catherine Gallagher 23 Daughter Clerk New York
40 Contd. 1-1B Gallagher 23 Daughter — New York

Search for William Mcgrath

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Pedigree Summary

William + 4 siblings
Gen 1 · 6 parents ~0.92
Max depth 4 (1900–1950 window)

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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