MC
Mary Casey — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Custer-County, Montana
Our Model Tree links this Mary Casey across the 1920, 1930 and 1940 US Censuses in Custer-County, Montana (XGBoost, ~Confirmed) — first a spouse (b.~1885), then head of a 3-person household.
Age 55
b. ~1885
Female
Spouse
Born: Denmark
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Custer-County, Montana |
| Surname | Casey |
| Given Name | Mary C. |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Denmark |
| 1935 Residence (City) | U. S. Range Experiment Station District 1, Miles City |
| 1935 Residence (County) | Custer |
| Naturalization Status | Naturalized |
| Additional Details | |
| Highest Grade | H 8 |
| 1935 Residence | Same place |
| Birth Country | Denmark |
| Birthplace (normalized) | denmark |
| Township / Ward | U S Range Experiment Station District 1 Miles City |
| Est. Birth Year | ~1885 |
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 |
|---|---|---|---|---|
| Charles Casey | Head | — | 57 | ~1883 |
| Floyd Casey | Son | — | 26 | ~1914 |
| Mary Casey | Spouse | — | 55 | ~1885 |
Census Appearances
1920
Custer, Montana
Spouse, age 34
Custer, Montana · implied b. ~1886 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Casey |
| Given Name | Mary E. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 34 |
| Marital Status | Married |
| Birthplace | Denmark |
| Year of Immigration | 1911 |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Norway |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth Country | Denmark |
| Birthplace (normalized) | denmark |
1930
Custer, Montana
Spouse, age 45
Custer, Montana · implied b. ~1885 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Casey |
| Given Name | Mary L. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Denmark |
| Naturalization Status | Naturalized |
| Year of Immigration | 1886 |
| Age at First Marriage | 24 |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Sweden |
| Occupation | Laborer |
| Industry | Experiment Station |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | Danish |
| Birth Country | Denmark |
| Birthplace (normalized) | denmark |
1940
Custer-County, Montana
Spouse, age 55
Custer-County, Montana · implied b. ~1885 — 3 household members
| Surname | Casey |
| Given Name | Mary C. |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Denmark |
| 1935 Residence (City) | U. S. Range Experiment Station District 1, Miles City |
| 1935 Residence (County) | Custer |
| Naturalization Status | Naturalized |
| Highest Grade | H 8 |
| 1935 Residence | Same place |
| Birth Country | Denmark |
| Birthplace (normalized) | denmark |
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 Casey across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Casey
Spouse · 1940 · age 55 · b. ~1885 · Montana
★ 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 — Custer-County, Montana
Open full size
1940 US Federal Census — Custer-County, Montana
Page Contents
37 people indexed on this census page (nara:1940:m-t0627-02216-00613)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Ellsworth C. Vinth | 41 | Head | Laborer | Wyoming |
| 42 | Sarah E. Vinth | 32 | Wife | — | Minnesota |
| 43 | Marjory S. Vinth | 14 | daughter | — | Montana |
| 44 | Guy L. Vinth | 8 | son | — | Montana |
| 45 | Alfred L. Baker | 42 | Head | Animal Husbandman | Michigan |
| 46 | Catherine Baker | 39 | wife | — | Michigan |
| 47 | Bruce A. Baker | 12 | son | — | Montana |
| 48 | Barbara J. Baker | 10 | daughter | — | Montana |
| 49 | Janet P. Baker | 8 | daughter | — | Montana |
| 50 | John R. Love | 45 | Head | Laborer | Indiana |
| 51 | Bernice L. Love | 38 | wife | Clerk | South Dakota |
| 52 | Donald D. Love | 17 | son | — | Montana |
| 53 | Frank Carry | 56 | Head | Laborer | North Dakota |
| 54 | Sarah J. Carry | 61 | wife | — | Vermont |
| 55 | Charles E. Casey | 57 | Head | Laborer | Montana |
| 56 | Mary C. Casey THIS PERSON | 55 | wife | — | Denmark |
| 57 | Floyd C. Casey | 26 | son | Laborer | Montana |
| 58 | Clarence S. De Lange | 27 | Head | Laborer | North Dakota |
| 59 | Margaret De Lange | 26 | wife | 24 | Montana |
| 60 | James E. De Lange | 1 | son | — | Montana |
| 61 | Jesse H. Trafton | 50 | Head | Laborer | Massachusetts |
| 62 | Elisabeth H. Trafton | 45 | wife | — | Canada |
| 63 | Leslie H. Trafton | 22 | son | Salesman | Montana |
| 64 | Sherman W. Trafton | 20 | son | Mechanic | Montana |
| 65 | Alma M. Trafton | 16 | daughter | — | Montana |
| 66 | Edwin J. Woolfolk | 33 | Head | Assistant Superintendent | Wyoming |
| 67 | Yvonne Woolfolk | 29 | wife | — | Montana |
| 68 | Mary-Jo Woolfolk | 5 | daughter | — | Montana |
| 69 | Edwin M. Woolfolk | 0 | son | — | Montana |
| 70 | David G. Hammond | 68 | Head | Laborer | Illinois |
| 71 | Harry P. Berg | 36 | Head | Laborer | North Dakota |
| 72 | Geha Berg | 70 | mother | — | Norway |
| 73 | Martin Doyle | 48 | Head | Laborer | Eire |
| 74 | Isaac A. Stewart | 57 | Head | Laborer | Texas |
| 75 | Alma C. X. Stewart | 55 | Wife | — | Minnesota |
| 76 | Gladys I. Stewart | 20 | daughter | Stenographer | Montana |
| 77 | Douglas A. Stewart | 14 | son | — | Montana |
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)