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Mary Callahan — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Marion-County, Indiana

Our Model Tree links this Mary Callahan across the 1930 and 1940 US Censuses in Marion-County, Indiana (XGBoost, ~Confirmed) — first a daughter (b.~1919), then head of a 9-person household.

Age 21 b. ~1919 Female Daughter Born: Indiana Single

1940 Census Record Details

Census Year1940
LocationMarion-County, Indiana
SurnameCallahan
Given NameMary J.
Relationship to HeadDaughter
SexF
Color / RaceWhite
Age21
Marital StatusSingle
BirthplaceIndiana
1935 Residence (City)Indianapolis City
1935 Residence (County)Marion
Additional Details
Class of Worker0
Highest GradeH-4
1935 ResidenceSame House
Birth StateIndiana
Birth CountryUnited States
Birthplace (normalized)indiana
Township / WardIndianapolis 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.

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

Name Relation to head Relative to Mary Age Birth yr
Mary Callahan Daughter — 21 ~1919
Margaret Callahan Daughter — 16 ~1924
Anne Callahan Daughter — 13 ~1927
Rose Callahan Daughter — 19 ~1921
Julia Callahan Daughter — 11 ~1929
William Callahan Head — 53 ~1887
Anne Leahy Other — 86 ~1854
John Callahan Son — 22 ~1918
Anne Callahan Spouse — 51 ~1889

Census Appearances

1930
Marion, Indiana
Daughter, age 11
Marion, Indiana · implied b. ~1919 — 8 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 11
Marital Status Single
Birthplace Indiana
Father's Birthplace Indiana
Mother's Birthplace Indiana
Occupation none
Can Read/Write Yes
Birth State Indiana
Birth Country United States
Birthplace (normalized) indiana
1940
Marion-County, Indiana
Daughter, age 21
Marion-County, Indiana · implied b. ~1919 — 9 household members
Surname Callahan
Given Name Mary J.
Relationship to Head Daughter
Sex F
Color / Race White
Age 21
Marital Status Single
Birthplace Indiana
1935 Residence (City) Indianapolis City
1935 Residence (County) Marion
Class of Worker 0
Highest Grade H-4
1935 Residence Same House
Birth State Indiana
Birth Country United States
Birthplace (normalized) indiana

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 21 · b. ~1919 · Indiana
★ You are viewing this record
Sibling
Anne Callahan
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Callahan
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Julia Callahan
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Callahan
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rose 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 — Marion-County, Indiana Open full size

Page Contents

38 people indexed on this census page (nara:1940:m-t0627-01126-00330)

Line Name Age Relation Occupation Birthplace
1 Forest Forest 14 Son — Indiana
2 Howard Forest 12 Son — Indiana
3 Harold H. Craig 32 Head Deliveryman Indiana
4 Bessie A. Craig 23 Wife — Michigan
5 Jack H. Craig 3 Son 0 Michigan
6 Nellie Eubank 70 Head — Indiana
7 Rex A. Eubank 41 Son Service Attendant Indiana
8 Howard Craig 29 Head Salesman Indiana
9 Frances J. Craig 28 Wife — Indiana
10 Marshall Jones 26 Head Tester Indiana
11 Katie Jones 27 Wife — Indiana
12 Marcia Kaye Jones 0 Daughter 0 Indiana
13 William Stanley 26 Head Shipping Clerk Indiana
14 Margaret Stanley 25 Wife — Indiana
15 William Stanley 4 Son 0 Indiana
16 William F. Callahan 53 Head Machinist Indiana
17 Anne C. Callahan 51 Wife Maid Indiana
18 John P. Callahan 22 Son General Office Bookkeeper Indiana
19 Mary J. Callahan THIS PERSON 21 Daughter — Indiana
20 Rose E. Callahan 19 Daughter Reknitter Indiana
21 Margaret L. Callahan 16 Daughter — Indiana
22 Anne L. Callahan 13 Daughter — Indiana
23 Julia T. Callahan 11 Daughter — Indiana
24 Anne M. Leahy 86 Mother-in-law — Eire
27 Joseph C. Fendel 54 Head Repairman Indiana
28 Ora L. Fendel 52 Wife — Kentucky
29 Florence Fendel 26 Daughter Mender Indiana
30 Joseph Fendel 24 Son Machinist Indiana
31 William Whitaker 4 Son 0 Indiana
32 Mildred Whitaker 2 Daughter 0 Indiana
33 Walter Spahr 63 Head Junior Accountant Indiana
34 Jessie D. Spahr 56 Wife — Kentucky
35 Martin J. Towney 45 Head Letter Carrier Indiana
36 Mary E. Towney 43 Wife — Indiana
37 Minnie C. Wheeler 41 Sister-in-law Stenographer Indiana
38 Louis Gleason 45 Head Collector Indiana
39 Maude Gleason 44 Wife — Indiana
40 Dorothy M. Gleason 23 Daughter Lecturer Indiana

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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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