MC
Mary Callahan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Allen-County, Indiana
Our Model Tree links this Mary Callahan across the 1930 and 1940 US Censuses in Allen-County, Indiana (XGBoost, ~Confirmed) — first a daughter (b.~1911), then head of a 9-person household.
Age 29
b. ~1911
Female
Daughter
Born: Indiana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allen-County, Indiana |
| Surname | Callahan |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Fort Wayne City |
| 1935 Residence (County) | Allen |
| Additional Details | |
| Occupation | Bookkeeper |
| Industry | Public School |
| Class of Worker | GW |
| Hours Worked | 35 |
| Income (1939) | 1250 |
| Highest Grade | No 8 |
| 1935 Residence | Same Place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Occupation | Bookkeeper |
| Township / Ward | Fort Wayne City |
| Est. Birth Year | ~1911 |
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 |
|---|---|---|---|---|
| Virginia Callahan | Daughter | — | 20 | ~1920 |
| Dorothy Callahan | Daughter | — | 23 | ~1917 |
| Mary Callahan | Daughter | — | 29 | ~1911 |
| Margaret Callahan | Daughter | — | 17 | ~1923 |
| Patricia Callahan | Daughter | — | 13 | ~1927 |
| Helen Callahan | Daughter | — | 15 | ~1925 |
| Frank Callahan | Head | — | 54 | ~1886 |
| James Callahan | Son | — | 26 | ~1914 |
| Mary Callahan | Spouse | — | 54 | ~1886 |
Census Appearances
1930
Allen, Indiana
Daughter, age 19
Allen, Indiana · implied b. ~1911 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Callahan |
| Given Name | Mary E H |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| 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
Allen-County, Indiana
Daughter, age 29
Allen-County, Indiana · implied b. ~1911 — 9 household members
| Surname | Callahan |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Fort Wayne City |
| 1935 Residence (County) | Allen |
| Occupation | Bookkeeper |
| Industry | Public School |
| Class of Worker | GW |
| Hours Worked | 35 |
| Income (1939) | 1250 |
| Highest Grade | No 8 |
| 1935 Residence | Same Place |
| 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.
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 29 · b. ~1911 · Indiana
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Sibling
Helen Callahan
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Virginia Callahan
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patricia Callahan
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Callahan
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Callahan
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Callahan
Sibling · 1940 · age 26
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, Indiana
Open full size
1940 US Federal Census — Allen-County, Indiana
Page Contents
35 people indexed on this census page (nara:1940:m-t0627-01115-00125)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 2 | Gah Bowers | 35 | Head | Medical Doctor | Ohio |
| 3 | Margaret Bowers | 35 | Wife | — | Indiana |
| 4 | George Bowers | 8 | Son | — | Indiana |
| 5 | Barbara Bowers | 5 | Daughter | — | Indiana |
| 6 | Anna Gelagung | 27 | Maid | Maid | Indiana |
| 7 | Charles N. Brink | 55 | Head | Manager | Indiana |
| 8 | Linna M. Brink | 56 | Wife | — | Indiana |
| 9 | Frank D. Callahan | 54 | Head | Proprietor | Indiana |
| 10 | Mary A. Callahan | 54 | Wife | — | Indiana |
| 11 | Mary E. Callahan THIS PERSON | 29 | Daughter | Bookkeeper | Indiana |
| 12 | James Callahan | 26 | Son | Office Manager | Indiana |
| 13 | Dorothy Callahan | 23 | Daughter | Music Teacher | Indiana |
| 14 | Virginia M. Callahan | 20 | Daughter | — | Indiana |
| 15 | Margaret Callahan | 17 | Daughter | — | Indiana |
| 16 | Helen Callahan | 15 | Daughter | — | Indiana |
| 17 | Patricia Callahan | 13 | Daughter | — | Indiana |
| 19 | William B. Loughry | 23 | Head | Asst. Equipment Engineer | Michigan |
| 20 | Margaret Loughry | 22 | Wife | — | Ohio |
| 21 | Margaret Loughry | 0 | Daughter | — | Indiana |
| 22 | Russell S. Harding | 38 | Head | Knitter | Indiana |
| 23 | Pearl Harding | 40 | Wife | — | Indiana |
| 24 | James Harding | 13 | Son | — | Indiana |
| 25 | Jacquelyn Harding | 9 | Daughter | — | Indiana |
| 27 | Elmer M. Offenberger | 47 | Head | Proprietor | Indiana |
| 28 | Jane S. Offenberger | 43 | Wife | — | Indiana |
| 29 | William B. Offenberger | 23 | Son | Clerk | Indiana |
| 30 | Robert H. Offenberger | 21 | Son | Clerk | Indiana |
| 31 | Donald E. Offenberger | 11 | Son | — | Indiana |
| 32 | Charles P. Porter | 77 | Head | Solicitor | California |
| 33 | Anna D. Porter | 67 | Wife | — | Indiana |
| 35 | Herman Schiele | 59 | Head | Proprietor | Indiana |
| 36 | Florence S. Schiele | 58 | Wife | — | Indiana |
| 37 | Hattie Boembke | 63 | Sister-in-law | Clerk | Indiana |
| 39 | Leslie D. Fry | 43 | Head | Manager | Illinois |
| 40 | Dorothy M. Fry | 41 | Wife | — | Canada |
Related Census Records
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)