MC
Mary Callahan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Marion-County, Indiana
Our Model Tree links this Mary Callahan across the 1920, 1930 and 1940 US Censuses in Marion-County, Indiana (XGBoost, ~Confirmed) — first a head (b.~1860), then head of a 3-person household.
Age 80
b. ~1860
Female
Head
Born: Indiana
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Marion-County, Indiana |
| Surname | Callahan |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 80 |
| Marital Status | Widowed |
| Birthplace | Indiana |
| 1935 Residence (City) | Indianapolis City |
| 1935 Residence (County) | Marion |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Township / Ward | Indianapolis City |
| Est. Birth Year | ~1860 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Beatrice Callahan | Daughter | — | 50 | ~1890 |
| Mary Callahan | Head | — | 80 | ~1860 |
| Roy Callahan | Son | — | 40 | ~1900 |
Census Appearances
1920
Marion, Indiana
Head, age 57
Marion, Indiana · implied b. ~1863 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Callahan |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 57 |
| Marital Status | Widowed |
| Birthplace | Indiana |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Indiana |
| Occupation | Dressmaker |
| Industry | in Home |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1930
Marion, Indiana
Head, age 68
Marion, Indiana · implied b. ~1862 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Callahan |
| Given Name | Mary C |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 68 |
| Marital Status | Widowed |
| Birthplace | Indiana |
| Age at First Marriage | 21 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 40 |
| Radio Set | R |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
Marion-County, Indiana
Head, age 80
Marion-County, Indiana · implied b. ~1860 — 3 household members
| Surname | Callahan |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 80 |
| Marital Status | Widowed |
| Birthplace | Indiana |
| 1935 Residence (City) | Indianapolis City |
| 1935 Residence (County) | Marion |
| Income (1939) | 0 |
| 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 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Callahan
Head · 1940 · age 80 · b. ~1860 · Indiana
★ You are viewing this record
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
1940 US Federal Census — Marion-County, Indiana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01125-00614)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Elizabeth Woods | 65 | Head | — | Indiana |
| 2 | Dorothea Woods | 39 | daughter | Clerical Wk. | Indiana |
| 3 | Mary Callahan THIS PERSON | 80 | Head | — | Indiana |
| 4 | Beatrice Callahan | 50 | daughter | — | Indiana |
| 5 | Roy Callahan | 40 | son | — | Indiana |
| 6 | Martin Scovell | 39 | Head | Estimator | Indiana |
| 7 | Roberta Scovell | 33 | wife | — | Indiana |
| 8 | Marcia Ann Scovell | 8 | daughter | — | Indiana |
| 9 | Rose L. Scovell | 79 | mother | — | Indiana |
| 10 | Harry Warriner | 32 | Head | Printer | Indiana |
| 11 | Harriet Warriner | 31 | wife | — | Illinois |
| 12 | Robert Warriner | 4 | son | — | Indiana |
| 13 | James Warriner | 25 | Head | Ser. Office | Indiana |
| 14 | Ruth Warriner | 26 | wife | — | Indiana |
| 15 | Judith Warriner | 0 | daughter | — | Indiana |
| 16 | Walter Comstock | 49 | Head | Agent | Indiana |
| 17 | Mayme Comstock | 50 | wife | Dipper | Indiana |
| 18 | Ellen Comstock | 23 | daughter | Packer | Indiana |
| 19 | Napoleon La Bonte | 57 | Head | Medical Doctor | Connecticut |
| 20 | Ethel La Bonte | 53 | wife | — | Illinois |
| 21 | James La Bonte | 16 | son | — | Indiana |
| 22 | Marie La Bonte | 15 | daughter | — | Indiana |
| 23 | Crystal Evans | 35 | cousin | Registered Nurse | Indiana |
| 24 | Willis R. Finlayson | 59 | Head | Factory Rep. | Iowa |
| 25 | Nelle Finlayson | 60 | wife | — | Iowa |
| 26 | Harold L. King | 29 | Head | Knitter | Louisiana |
| 27 | Edna L. King | 26 | wife | — | Indiana |
| 28 | Alice King | 50 | mother | Looper | Louisiana |
| 29 | Wm. C. Schwein | 58 | Head | Iron Worker | Indiana |
| 30 | Dessie B. Schwein | 59 | wife | — | Indiana |
| 31 | Left 3 Spaces For Above Household - And Found Only 2 Who Resided There - | None | — | — | — |
| 32 | Louis Walther | 39 | Head | Sales Manager | Ohio |
| 33 | Violet Walther | 38 | wife | — | Indiana |
| 34 | Carol Ann Walther | 7 | daughter | — | Missouri |
| 35 | Wilbur Spangler | 25 | Head | Ass'T Engineer | Illinois |
| 36 | Louise H. Spangler | 24 | wife | — | Illinois |
| 37 | Jeannette Spangler | 0 | daughter | — | Indiana |
| 38 | Herman C. Stuckey | 27 | Head | Traveling Salesman | Indiana |
| 39 | Dana Stuckey | 29 | wife | — | Indiana |
| 40 | Judith Ann Stuckey | 3 | daughter | — | Indiana |
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)