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Mary Callahan — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Allen-County, Ohio

Our Model Tree links this Mary Callahan across the 1930 and 1940 US Censuses in Allen-County, Ohio (XGBoost, ~Confirmed) — first a daughter (b.~1922), then head of a 8-person household.

Age 18 b. ~1922 Female Daughter Born: Ohio Single

1940 Census Record Details

Census Year1940
LocationAllen-County, Ohio
SurnameCallahan
Given NameMary Jane
Relationship to HeadDaughter
SexF
Color / RaceWhite
Age18
Marital StatusSingle
BirthplaceOhio
1935 Residence (City)Lima City
1935 Residence (County)Allen
Additional Details
Class of Worker0
Hours Worked0
Highest GradeH-4
1935 ResidenceSame place
Birth StateOhio
Birth CountryUnited States
Birthplace (normalized)ohio
Township / WardLima City
Est. Birth Year~1922

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.

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

Name Relation to head Relative to Mary Age Birth yr
Mary Callahan Daughter — 18 ~1922
Patricia Callahan Daughter — 15 ~1925
Martha Callahan Daughter — 9 ~1931
Frank Callahan Head — 51 ~1889
John Callahan Son — 11 ~1929
Thomas Callahan Son — 13 ~1927
Frank Callahan Son — 16 ~1924
Bertha Callahan Spouse — 46 ~1894

Census Appearances

1930
Allen, Ohio
Daughter, age 8
Allen, Ohio · implied b. ~1922 — 7 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname Callahan
Given Name Mary J
Relationship to Head daughter
Sex F
Color / Race White
Age 8
Marital Status Single
Birthplace Ohio
Father's Birthplace Ohio
Mother's Birthplace Kentucky
Occupation none
Birth State Ohio
Birth Country United States
Birthplace (normalized) ohio
1940
Allen-County, Ohio
Daughter, age 18
Allen-County, Ohio · implied b. ~1922 — 8 household members
Surname Callahan
Given Name Mary Jane
Relationship to Head Daughter
Sex F
Color / Race White
Age 18
Marital Status Single
Birthplace Ohio
1935 Residence (City) Lima City
1935 Residence (County) Allen
Class of Worker 0
Hours Worked 0
Highest Grade H-4
1935 Residence Same place
Birth State Ohio
Birth Country United States
Birthplace (normalized) ohio

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 Callahan across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Callahan
Daughter · 1940 · age 18 · b. ~1922 · Ohio
★ You are viewing this record
Sibling
Patricia Callahan
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Callahan
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Callahan
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Martha Callahan
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frank Callahan
Sibling · 1940 · age 16
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 — Allen-County, Ohio Open full size

Page Contents

39 people indexed on this census page (nara:1940:m-t0627-03020-00709)

Line Name Age Relation Occupation Birthplace
1 Olivia Metger 12 Daughter — Ohio
2 Robert Metger 11 Son — Ohio
3 Joseph Graham 37 Head Executive Michigan
4 Inez Graham 37 Wife — Ohio
5 Joan Graham 14 Daughter — Ohio
6 Jane Graham 10 Daughter — Ohio
7 James Graham 6 Daughter — Ohio
8 Catherine Schafer 60 Head — Ohio
9 Hale Barrett 49 Head Owner Ohio
10 Ann Barrett 41 Wife Assistant Minnesota
11 Edwin L. Van Ausdel 65 Head — Illinois
12 Dora Van Ausdel 60 Wife — Illinois
13 Opal Schafer 46 Head Stenographer Ohio
14 Cecilia Schafer 13 Daughter — Ohio
15 Catherine Schafer 10 Daughter — Ohio
16 Helen Schafer 8 Daughter — Ohio
17 Frank Callahan 51 Head Executive Ohio
18 Bertha Callahan 46 Wife — Kentucky
19 Mary Jane Callahan THIS PERSON 18 Daughter — Ohio
20 Frank Jr. Callahan 16 Son — Ohio
21 Patricia Callahan 15 Daughter — Ohio
22 Thomas B. Callahan 13 Son — Ohio
23 John Robert Callahan 11 Son — Ohio
24 Martha Elizabeth Callahan 9 Daughter — Ohio
25 Daniel Dimond 62 Head Salesman Ohio
26 Ella Dimond 59 Wife Cigar Maker Ohio
27 Eugene Dimond 25 Son Press Sticker Ohio
28 Gerald Dimond 22 Son Store Room Ohio
29 John L. Zinn 54 Head Foreman Ohio
30 Hazel Zinn 53 Wife — Ohio
31 James Zinn 19 Son — Ohio
32 John Zinn 18 Son Paper Route Ohio
33 Charles Zinn 15 Son — Ohio
34 Marjorie Zinn 8 Daughter — Ohio
35 Elizabeth Warburton 45 Head Cigar Maker Germany
36 Ralph Warburton 17 Son — Ohio
37 Mary Broderick 75 Head — Ohio
38 Emma Conner 79 Head — Ohio
39 Leona Conner 53 Daughter Bookkeeper Ohio

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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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