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Mary Martin — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Roosevelt-County, Montana
Our Model Tree links this Mary Martin across the 1920, 1930 and 1940 US Censuses in Roosevelt-County, Montana (XGBoost, ~Confirmed) — first a spouse (b.~1895), then head of a 7-person household.
Age 45
b. ~1895
Female
Spouse
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Roosevelt-County, Montana |
| Surname | Martin |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Township 29 |
| 1935 Residence (County) | Roosevelt |
| Additional Details | |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Township 29 |
| Est. Birth Year | ~1895 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Wilma Martin | Daughter | — | 18 | ~1922 |
| Maxine Martin | Daughter | — | 9 | ~1931 |
| Margurete Martin | Daughter | — | 20 | ~1920 |
| Muller Martin | Head | — | 54 | ~1886 |
| Franklin Martin | Son | — | 25 | ~1915 |
| Raymond Martin | Son | — | 24 | ~1916 |
| Mary Martin | Spouse | — | 45 | ~1895 |
Census Appearances
1920
Roosevelt, Montana
Spouse, age 24
Roosevelt, Montana · implied b. ~1896 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Married |
| Birthplace | Iowa |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Denmark |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Roosevelt, Montana
Spouse, age 34
Roosevelt, Montana · implied b. ~1896 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 34 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 18 |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Denmark |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Roosevelt-County, Montana
Spouse, age 45
Roosevelt-County, Montana · implied b. ~1895 — 7 household members
| Surname | Martin |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Township 29 |
| 1935 Residence (County) | Roosevelt |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
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 Martin 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 Martin
Spouse · 1940 · age 45 · b. ~1895 · Montana
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Roosevelt-County, Montana
Open full size
1940 US Federal Census — Roosevelt-County, Montana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02228-00703)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Simon Madsen | 57 | Head | Farmer | Denmark |
| 2 | Frank E. Nelsen | 44 | Head | Farmer | Minnesota |
| 3 | Carrie Nelsen | 34 | Wife | — | Minnesota |
| 4 | Eileen Nelsen | 5 | Daughter | — | Montana |
| 5 | John Hofman | 62 | Head | Farmer | Denmark |
| 6 | Lena Hofman | 62 | Wife | — | Denmark |
| 7 | Lilly Hofman | 29 | Daughter | Restaurant Operator | Montana |
| 8 | Fred Hofman | 26 | Son | Labor | Montana |
| 9 | Agner Hofman | 19 | Son | Steward | Montana |
| 10 | John Hofman | 15 | Son | Labor | Montana |
| 11 | Ruth Hofman | 11 | Daughter | — | Montana |
| 12 | Jacob Thomsen | 54 | Head | Farmer | Denmark |
| 13 | Carrie M. Thomsen | 51 | Wife | — | Nebraska |
| 14 | Clifford M. Thomsen | 20 | Son | Mechanic | Montana |
| 15 | Arnold W. Thomsen | 18 | Son | — | Montana |
| 16 | Svend O. Jensen | 53 | Head | Carpenter | Denmark |
| 17 | Mable A. Jensen | 39 | Wife | — | No. Dak. |
| 18 | Marie E. Jensen | 89 | Mother | — | Denmark |
| 19 | Martin Olsen | 56 | Head | Farmer | Denmark |
| 20 | Anna D. Olsen | 56 | Wife | — | Denmark |
| 21 | Einar W. Olsen | 25 | Son | — | Montana |
| 22 | Paul B. Olsen | 21 | Son | Farmer | Montana |
| 23 | Gerald E. Olsen | 20 | Son | — | Montana |
| 24 | Dagny L. Olsen | 15 | Daughter | Librarian | Montana |
| 25 | Muller Martin | 54 | Head | Farmer | Norway |
| 26 | Mary Martin THIS PERSON | 45 | Wife | — | Iowa |
| 27 | Franklin B. Martin | 25 | Son | Farm Labor | Montana |
| 28 | Raymond Martin | 24 | Son | Farm Mech | Montana |
| 29 | Margurete L. Martin | 20 | Daughter | Operator | Montana |
| 30 | Wilma G. Martin | 18 | Daughter | Stenographer | Montana |
| 31 | Maxine L. Martin | 9 | Daughter | — | Montana |
| 32 | Jorgen Smith | 67 | Head | Farmer | Denmark |
| 33 | Kristina Smith | 57 | Wife | — | Denmark |
| 34 | Sidney Blair | 59 | Head | Farmer | Arkansas |
| 35 | Mary E. Blair | 62 | Wife | — | Arkansas |
| 36 | Samuel E. Blair | 25 | Son | Farmer (Son On) | Minnesota |
| 37 | Manuel Larsen | 42 | Head | Farmer & Miner | Nebraska |
| 38 | Edith M. Larsen | 34 | Wife | — | Wisconsin |
| 39 | Calvin L. Larsen | 12 | Son | — | Montana |
| 40 | Shirley R. Larsen | 10 | Daughter | — | Montana |
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)