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Margaret Callahan — 1940 US Census Record

Model Tree available

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

Our Model Tree links this Margaret Callahan across the 1920, 1930 and 1940 US Censuses in New-York-County, New York (XGBoost, ~Confirmed), with identified parents Francis & James — first a daughter (b.~1919), then head of a 4-person household.

Age 21 b. ~1919 Female Daughter Born: New York Single

1940 Census Record Details

Census Year1940
LocationNew-York-County, New York
SurnameCallahan
Given NameMargaret
Relationship to HeadDaughter
SexF
Color / RaceWhite
Age21
Marital StatusSingle
BirthplaceNew York
1935 Residence (City)New York City
1935 Residence (County)NEW YORK
Additional Details
Class of WorkerNo
Highest GradeC 2
1935 ResidenceSame place
Birth StateNew York
Birth CountryUnited States
Birthplace (normalized)new york
Township / WardNew York City
Est. Birth Year~1919

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.

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

Name Relation to head Relative to Margaret Age Birth yr
Margaret Callahan Daughter — 21 ~1919
Elenore Callahan Daughter — 16 ~1924
Ellen Callahan Head — 45 ~1895
Anna Callahan Daughter — 19 ~1921

Census Appearances

1920
New York, …
Daughter, age
New York, New York · implied b. ~1920 — 6 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname Callahan
Given Name Margaret
Relationship to Head Daughter
Sex F
Color / Race White
Age 0
Marital Status Single
Birthplace New York
Father's Birthplace New York
Mother's Birthplace New York
Occupation W
Birth State New York
Birth Country United States
Birthplace (normalized) new york
1930
New York, …
Daughter, age 10
New York, New York · implied b. ~1920 — 4 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname Callahan
Given Name Margaret
Relationship to Head Daughter
Sex F
Color / Race White
Age 10
Marital Status Single
Birthplace New York
Father's Birthplace New York
Mother's Birthplace New York
Birth State New York
Birth Country United States
Birthplace (normalized) new york
1940
New-York-County, New …
Daughter, age 21
New-York-County, New York · implied b. ~1919 — 4 household members
Surname Callahan
Given Name Margaret
Relationship to Head Daughter
Sex F
Color / Race White
Age 21
Marital Status Single
Birthplace New York
1935 Residence (City) New York City
1935 Residence (County) NEW YORK
Class of Worker No
Highest Grade C 2
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 Margaret Callahan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Francis Callahan (~0.92 confidence) and father James Callahan (~0.92 confidence) and mother Anna Callahan (~0.92 confidence) and mother Ellen Callahan (~0.92 confidence) and mother Margaret Callahan (~0.92 confidence) and mother Margaret Callahan (~0.82 confidence). The pedigree spans 2 generations with 6 identified ancestors.
Show:
Gen 1 Parents confidence ≈ 0.9
Father
Francis Callahan
b. ~1888
Source father
● Household · direct · ~0.92
Father
James Callahan
b. ~1893
Source father
● Household · direct · ~0.92
Mother
Anna Callahan
b. ~1887
Source mother
● Household · direct · ~0.92
Mother
Ellen Callahan
b. ~1895
Source mother
● Household · direct · ~0.92
Mother
Margaret Callahan
b. ~1896
Source mother
● Household · direct · ~0.92
Mother
Margaret Callahan
b. ~1860
Source mother>mother
● Household · direct · ~0.82
This person
Anchor record
Margaret Callahan
Daughter · 1940 · age 21 · b. ~1919 · New York
★ You are viewing this record
Sibling
Elenore Callahan
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anna Callahan
Sibling · 1940 · age 19
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-t0627-02677-00396)

Line Name Age Relation Occupation Birthplace
1 Walter Swank 38 Head Doorman Pennsylvania
2 Olive Swank 28 Wife — Pennsylvania
3 Walter Jr. Swank 1 Son — Pennsylvania
4 Earl Swank 25 Brother Doorman Pennsylvania
5 William Murdock 42 Head Truck Driver New York
6 Monica Murdock 42 Wife — Ireland
7 Mary Murdock 12 Daughter — New York
8 Ralph Martinez 38 Head Clerk Porto Rico
9 Carmen Martinez 33 Wife — Porto Rico
10 Ralph Jr. Martinez 9 Son — New York
11 Robert Martinez 2 Son — New York
12 Samuel Leibowitz 62 Head Salesman Russia
13 Lillian Leibowitz 60 Wife — Russia
14 Dorothy Leibowitz 25 Daughter Group Leader New York
15 William Leibowitz 19 Son Machinist New York
16 Abraham Leibowitz 18 Son New Worker New York
17 John Wilson 52 Head Blacksmith Pennsylvania
18 Anna Wilson 47 Wife — Pennsylvania
19 Harold Wilson 22 Son Runner Pennsylvania
20 Theodore Hughes 34 Boarder Handy Man Pennsylvania
21 Cora Hughes 35 Boarder — Pennsylvania
22 Theodore Jr. Hughes 2 Son — New York
23 Thomas Lee 33 Head Baker Ireland
24 Anne Lee 33 Wife — Ireland
25 Robert Lee 5 Son — New York
26 George Cox 27 Head Clerk New York
27 Julia Cox 25 Wife — New York
28 George Jr. Cox 7 Son — New York
29 George Avlon 50 Head Cook Greece
30 Marie Avlon 38 Wife — New York
31 Edward Avlon 15 Son — New York
32 Robert Avlon 13 Son — New York
33 Stephen Avlon 11 Son — New York
34 John Avlon 6 Son — New York
35 Ellen Callahan 45 Head — Ireland
36 Margaret Callahan THIS PERSON 21 Daughter — New York
37 Anna Callahan 19 Daughter New Worker New York
38 Elenore Callahan 16 Daughter — New York
39 Mary Grimes 65 Head — Ireland
40 Clement Grimes 39 Son Handyman New York

Search for Margaret Callahan

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Pedigree Summary

Margaret + 2 siblings
Gen 1 · 5 parents ~0.92
Gen 2 · 1 grandparents ~0.82
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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